If your air conditioner does not work properly, first check the following points before requesting service. If it still does not work properly, contact your dealer or a service center.
Trouble
Air conditioner does not run at all.
Possible Cause
1. Power failure. 2. Leakage circuit breaker has tripped. 3. Line voltage is too low. 4. Operation button is turned off. 5. The wireless remote controller or heat pump is malfunctioning. 6. Batteries in wireless remote controller have run down.
Remedy
1. Restore power. 2. Contact service center. 3. Consult your electrician or dealer. 4. Press the button again. 5. Consult your dealer. 6. Replace batteries.
Trouble
Compressor runs but soon stops.
Possible Cause
1. Obstruction in front of condenser coil.
Remedy
1. Remove obstruction.
Trouble
Poor cooling (or heating) performance.
Possible Cause
1. Dirty or clogged air filter. 2. Heat source or many people in room. 3. Doors and/or windows are open. 4. Obstacle near air intake or air discharge port. 5. Thermostat is set too high for cooling (or too low for heating). 6. (Outdoor temperature is too low). 7. (Defrosting system does not work.)
Remedy
1. Clean air filter to improve the airflow. 2. Eliminate heat source if possible. 3. Shut them to keep the heat (or cold) out. 4. Remove it to ensure good airflow. 5. Set the temperature lower (or higher). 6. (Consult your dealer.) 7. (Consult your dealer.)
Trouble
Lamps on the indoor unit are flashing.
Possible Cause
1. Trouble in wiring system
Possible Cause
1. Contact service center.
Tips for Energy Saving
Do not block the air intake and outlet of the unit. If either is obstructed, the unit will not work well, and may be damaged.
Do not let direct sunlight into the room. Use sunshades, blinds or curtains.If the walls and ceiling of the room are warmed by the sun, it will take longer to cool the room.
Always try to keep the air filter clean. (Refer to Care and Cleaning.) A clogged filter will impair the performance of the unit.
To prevent conditioned air from escaping, keep windows, doors and any other openings closed.
Should the power fail while the unit is running
If the power supply for this unit is temporarily cut off, the unit will automatically resume operation once power is restored using the same settings before the power was cut off.
Vibrating sounds from heat pumps are difficult to eliminate. You can put rubber isolation pad under the unit to mitigate it. If the refrigerant piping is strapped too tightly to the joists, it can result in vibration.
Here is a list of causes that can cause noisy heat pumps:
Not working compressor valves or motor
Broken or misaligned fan blades
Low refrigerant level
Faulty reversing valve
Noisy solenoid coil or contractor
Loud compressor or unit
Ice build-up in the outdoor unit
Something coming in the way of spinning fans
Loose parts
Refrigerant pipes secures too tightly to joists
Outdoor unit needs to shut down through the main circuit breaker:
This is genuine problem which can lead to freezing of the indoor unit. The ice will then travel to external unit. There are some common reasons that can cause this. One could be a stuck contractor.It is always wise to replace the contractor in such situation. Another cause would be a shorted thermostat cable. The short can be caused by a string trimmer hitting against the wire outside. It could also be due to a wire staple piercing on a wire. Rodent-chewed wire or a bad wire could also cause this. Lastly, the thermostat itself could be bad. It could be sending signals to the outdoor, when it does not need to.
Therefore this problem can be caused mainly due to:
Stuck contractor
Thermostat cable shorted
Bad thermostat
Thermostat light stays lit:
The usual cause of this is that the outdoor unit is locked out. The indoor unit will keep running. But as it cannot meet the cooling demand, the thermostat will remain lit.
The best way to deal with such a situation is to reset the unit. Put it off and wait for 30 seconds before turning it on. If both units start working and thermostat light goes out then the machine is back to normal. Remember it can take 10 minutes for the outdoor unit to start after resetting.
Possible Causes: This problem can be caused by an air conditioning system sized too large for the house. A way to tell if this is the root cause is if your air conditioning system has always had a problem adequately dehumidifying your home, and commonly short cycles (turns on and off frequently). If so, then an over sized system is the likely cause.
An overly large system will cool the air so fast that not enough of the humid air has made its way across the cooling coil to get dehumidified.
Once the thermostat setting shuts off the air conditioning because it has reached the desired temperature, there may still be too much humidity in the air.
Possible Solutions: The only real solution is to replace the condensing unit and coils with a properly sized system. You can also try to increase the cooling load artificially, such as by air conditioning your garage or basement space with additional ductwork.
You certainly do not want your air conditioner not to work when the dog days of summer are upon you. There is nothing worse than being hot and uncomfortable even though you own a central air conditioner. The secret with central air conditioning to keep the repair costs down is to take a few preventative maintenance steps and do the little repairs yourself if there is a problem. Here are a few examples of air conditioner troubleshooting.
Let It Breathe
The most important thing to making your central air work is to make sure it gets enough air going to it. The first place to start is to make sure that you replace your air filters on a monthly basis; you may be able to go a little longer if it is a high quality filter. This will ensure your central air gets the air it needs to circulate around the house. You will also have to make sure the area around the unit outside the house is kept free from filling up with leaves and keep the tall grass and weeds from growing up around it and shutting off the air to it. Air flow is vital to ensure your central air condensing unit works well too.
Unit Not Running
There are many air conditioner troubleshooting steps you can do yourself if you have even a little familiarity working around electricity. An example of this is if you turned your thermostat all the way down but your unit is not running; dont just pick up the phone and call your local HVAC technician, check out a few things first. You certainly dont want to pay for a service call just to have a technician come out and do something like reset a breaker.
Is It Getting Power
And that is where you need to start if the unit is not running. Check the breaker for the unit at the electrical panel first. If there are no problems there then the next step is to inspect the electrical disconnect that will be mounted on the wall of your house near the unit. Make sure the fuses are not blown if it is a fuse type disconnect or make sure that it does not look burnt if it is a pull in and out type disconnect; to do this just pull out the disconnect and check the electrical contacts on the part you pulled out and look at the terminals on the wall mounted fixture too. If these are ok then go to the air conditioner itself next to do more air conditioner troubleshooting. (Make sure the power to the unit is off when doing all the steps mentioned here!!)
At the Unit
Once at the unit itself you will have to take the screws out that hold on the air conditioner electrical access door. Once inside the control panel, follow the incoming power to the electrical contactor. If these go bad they will usually have very pronounced burn marks and scarring of the metal contacts. If you see this type of damage is present then replace the contactor.
If you have done all of these steps and the unit is still not starting then it is probably now time to pick up the phone and call an HVAC technician to continue on with your air conditioner troubleshooting.
Air Conditioner Troubleshooting questions? Read further or just call us! Angel Heating & Cooling Contractor for all your HVAC needs Proudly serving Bucks County, PA, Montgomery County, PA, Burlington County, NJ, Philadelphia, PA, and Camden, NJ.
Its blazing hot outside, your air conditioner isnt working, youre desperate for cool air. But wait! Put down the phone! Dont call your friendly neighborhood AC guy just yet. The problem might be something simple enough to fix yourself. If you dont want to wait (or pay!) for a repairman to come take a look at your system if you dont have to, run through these quick and easy air conditioner troubleshooting steps before you make that call. These are the same things HVAC specialists will look for, and about 50% of the time the fix is as simple as pressing a button or flipping a switch.
1. Turn Down Your Thermostat
The very first thing a repairman will do when he gets to your house is check your thermostat settings, and lower the temperature by at least 5 degrees. If your AC isnt turned on properly, or is set to a temperature at or above the ambient temperature of the room, the air conditioner wont turn on it could be as simple as that.
2. Check Your Thermostat Battery
If your thermostat is battery powered, and the battery dies, your whole HVAC system will stop working. Pretty ridiculous that a little AA could cause that much havoc, but swapping out an old battery with a new one can fix the circuit and get your cold air flowing again.
3. Check Your Breaker
If youve been running your air conditioner, especially on high through a heat wave, and all of a sudden it stops working, theres a good chance youve tripped a breaker or blown a fuse. If the breaker for your air conditioner, fan, or both is tripped (either partway or all the way off), turn it all the way off, then flip it back on and your appliances should start working again. That said, this is a fix you should only do once if the breaker trips again, especially within a few minutes, you should call your HVAC specialist (and maybe an electrician), because theres either something wrong with the electrical work in your AC, with your breaker, or your AC is drawing too much power from the circuit and overloading it.
4. Check The Power Button
No, really this is one youll feel pretty dumb paying a repairman to do. Many air conditioning units have a kill switch, usually one on the indoor and one on the outdoor parts of the unit, that are used to power down the machines before service. If your machine isnt working, it could be that the power got turned off accidentally.
5. Check For Water Buildup
If your air conditioner has a special drip pan in the air handler or water removal pump for condensation, make sure that the area isnt filled with water (which could cause the machine to shut down to prevent it from overflowing), and that the pump is plugged in and working properly. If there IS water, drain it with a wet vac or call for service.
6. Check The Condenser
If your fan is running, your breaker is on, and your cooling unit still isnt doing anything, check the condenser for a high pressure cutout a button that would be sticking out of the cabinet near the refrigerant lines. If you see it, press it all the way in to reset it.
7. Maintenance, Maintenance
Ideally, your HVAC system should be seeing regular maintenance. But if you know youve been skipping on it, and youve gotten this far on the list, its time to play catch up. Clear the area around your condenser, cutting down grass and weeds and removing debris. Then with a special coil cleaner, clean your condenser and evaporator coils. If they arent reflective, sparkly clean, they arent clean enough. Finally, replace your filter! If its a reusable one, rinse it out or swap it with a second one, and if its not, replace it entirely in a humid climate, you should be doing this at least once a month. All that dirt and buildup on all the parts makes it harder for your AC to run and can eventually cause it to shut down.
8. The Touch Test
If both your blower and your condenser are running, but youre still not getting any cold air, touch the larger of the two copper lines exiting your condenser. If its warm, youre probably low on (or out of) refrigerant, or theres something wrong with your condenser and youll need to call a specialist. If its frosted over or icy, there could be an air flow problem or a clog inside. Shut the system down and let it thaw completely, then start it up again. If the coils freeze again, its time to call in the cavalry.
Hopefully somewhere between 1 and 8 you managed to fix your problem but if not, at least you know you wont have to pay for a specialist to come out and push a button!
Tags: Air Conditioner Air Conditioners Air Conditioning Repair Air Conditioning Solutions HVAC Repairs Troubleshooting Air Conditioning Troubleshooting
Are you a technician doing some air conditioning troubleshooting on a totally dead unit? Is it a nice hot summer day? Did you just finish a service call 20 minutes ago where you were sweating buckets wriggling around in somebody's steam-kettle attic? If you're done with your diet soda, grab your tools, crank up the can-do attitude, and let's go troubleshoot this air conditioner.
This unit's acting dead, so check the breaker, check the disconnect and fuses, and check to make sure you have correct power supplied to the unit. If the breaker is tripped and/or a fuse is blown, check the unit for grounds or shorts.
Disconnect the leads from the compressor terminals and check for grounded, shorted, or open windings. Check the evaporator and condenser fan motors for grounded or shorted windings. Check the control and power circuits for shorts or grounds.
If your air conditioning troubleshooting call is for a unit that has good supply voltage but is otherwise dead:
If your supply power checks out OK, make sure the thermostat is turned on, that there is control power to it, and verify that it actually works. If there's control power to the thermostat and it works, make sure the wires to the evap fan relay and condensing unit aren't broken at the thermostat, or somewhere between the thermostat and the units.
When the evaporator fan won't run:
Check for power at the evap fan relay. If it gets power but the contacts don't close, it has failed. If it gets power and the contacts close, but the fan doesn't run, check for voltage on the load side of the relay, check the leads to the fan, test the fan windings and the capacitor, and check to see if something is stuck in the blower and stopping it from turning.
When the condenser won't run:
Verify the cooling control signal from the thermostat. Check for refrigerant pressure. If the refrigerant has leaked, the low-pressure safety will open and the unit will not run.
Check the safeties. If the oil safety switch has tripped, check the oil level. It will also trip if the contactor closes but the compressor doesn't run for some reason, so check for open compressor windings, verify that the compressor terminal connections and contactor connections are tight, and verify that there is actually good voltage at the compressor when the contactor pulls in.
If the high-pressure safety is open, check your pressures. If head pressure has dropped below the cut in point of the safety, and it is an automatic reset type, the safety has failed. If the safety is a manual reset type, push the button and see if it will reset.
Check the voltage monitor if there is one. If your voltage is within range of the setting, the safety contacts should be closed. If they're not, the monitor has failed.
If there is a delay timer, check across the control terminals. If the delay timer contacts never close, it has failed.
If the safety contacts are closed, you should have control power at your contactor. If there is no control power at the contactor coil, check for a broken wire somewhere. If you have control power at the contactor coil but the contactor doesn't pull in, the contactor has failed.
If you're on an air conditioning troubleshooting call where the contactor pulls in but the compressor doesn't run, check for open compressor windings, verify that the compressor terminal connections and contactor connections are tight, and verify that there is actually good voltage at the compressor when the contactor pulls in.
If it's a single-phase compressor, check the start relay and the capacitors. The best way to test the start relay and capacitors is to replace them with new parts.
If the condenser fan doesn't run, check the relay, motor windings and capacitor, and fan blade, the same way as with the evaporator fan.
Be thorough as you trace down wiring and look for failed components, and always follow safety precautions during your air conditioning troubleshooting jobs.
By the time you reach this point of air conditioning troubleshooting, you will have found the failed component and repaired or replaced it, and the unit will be ready to run. Good job!
A technician attaches his gauges and checks pressures and temperatures. (Photo courtesy of York.)
When air conditioning troubleshooting on a unit that runs but doesn't seem to be cooling efficiently:
Check the evaporator and condenser fans. Verify the motors are the correct horsepower, and that they rotate in the proper direction and at the correct rpm. Verify that the fan and blower blades are clean, that they're the correct size and pitch, and that they are turning in the right direction.
Verify that the evaporator and condenser coils are clean and airflow is not blocked. Verify that the air filter is clean.
Verify that the condenser is getting normal temperature outside air, and that another unit isn't blowing hot air into it. Verify that the evaporator supply and return ducting is not leaking; losing cold air or picking up warm outside air.
At this point in this air conditioning troubleshooting job, attach your gauges and check your pressures and temperatures.
With the unit off and pressures equalized, verify that the system contains the correct refrigerant. You can do this by taking the temperature of the evaporator coil. It should match the pressure/temperature indication on your low side gauge or pressure/temperature chart.
Run the unit and check operating pressures. When the space has cooled down and is about 5 degrees above design temperature, look for the following pressures and temperatures.
Suction pressure should be in the range of 35 to 40 degrees below return air.
Discharge pressure should be in the range of 20 to 35 degrees above ambient air.
Superheat should be 20 to 30 degrees at the compressor.
Subcooling should be 10 to 15 degrees at the outlet of the receiver or condenser.
Air temperature rise through the condenser should be 20 to 30 degrees.
Air temperature drop through the evaporator should be 15 to 20 degrees.
If all of your operating characteristics fall within these ranges, the unit is running well.
At this stage of air conditioning troubleshooting, if there is still a concern about the unit not cooling properly, you will need to do a capacity check.
Measure the airflow in cfm through the evaporator. Measure the wet bulb temperatures of the air entering and leaving the evaporator.
Using a psychrometric chart or an enthalpy conversion table, convert the wet bulb temperatures to enthalpy values, and calculate the difference between the two values. Multiply the difference in enthalpy values times 4.5, which is a constant used in this calculation, and then multiply that product times the cfm. This will tell you how many Btu of heat the evaporator is absorbing from the air flowing through it.
Yes, air conditioning troubleshooting often involves some mathematics.
If the difference between design capacity and running capacity is minor, it can be adjusted by adjusting evaporator blower speed. If the unit is running at or near design capacity but still not handling the load of the space being cooled, the unit is simply too small.
Mike Taitano is a technician with 20 years of experience troubleshooting, repairing, and maintaining air conditioning and refrigeration equipment. He also operates Air-Conditioning-and-Refrigeration-Guide.com. For more information, visit www.air-conditioning-and-refrigeration-guide.com.
Carrier Air Conditioner Troubleshooting. Whether a Carrier air condition is a window or central unit, the basic components are the same: compressor, coil, fan, filter and thermostat. Finding a problem is the same procedure for both types of Carrier products. The one major difference between the window and central units is the central compressor is located outside the building while a window unit is all in one device. Finding the problem with a central unit may mean getting in the attic or crawlspace but troubleshooting the window unit generally means easier access.
All Carrier air conditioners need a filter to remove dirt and dust from entering the system. A good rule of thumb is to replace the filter in central units at least monthly. Carrier window air conditioner units often have a washable filter. Wash according to the manufacturers recommendations and dry thoroughly. Do not run the unit while replacing or cleaning the filter.
A thermostat controls the amount of air and how often the air conditioner runs to maintain a specific room temperature. Check the wall-mounted thermostat for proper operation. Some digital thermostats are battery powered. Replace batteries if necessary. Carrier window units use plug-in components easily replaced if the thermostat is functioning improperly. Replacing the thermostat can solve many problems with rooms too cold or too warm
Carrier air conditioners all have a compressor for compressing the coolant used to extract heat from the air. Check the compressor for proper vacuum level. If the compressor has a leak or the drive belt is not fully functional, pulling a vacuum will show less than specified results. The compressor vacuum is accessible by two access valves similar to the air valve on a tire. Using an air conditioner vacuum gauge attached to these valves while the unit operates will show the current vacuum levels. If the level is not low enough the compressor cannot fully compress the coolant and not achieve the maximum cold level.
Carrier air conditioners have two fans, one to draw exhaust from the unit (outside the building on central air units) and one to push cold air through the building or out of the window unit. Check all fans for proper operation. Check the fan blades and make sure none are damaged and the blades are firmly attached to the motor shaft. If your Carrier central air conditioner unit uses a drive belt to turn the fan, ensure the belt is tight and not slipping on the drive wheels. An improperly functioning fan motor may need replacing.
Air is passed over coils containing compressed coolant to reduce the temperature. Make sure the coils are clean and the air moves freely around. Also, check the coils for excessive condensation (water). Make sure all the proper insulation is around the coils. If the coils have developed a leak and are not holding coolant they may need to be replaced. Retail coil leak materials can be added to the coolant access valves, but success of these products is not assured depending on the size and frequency of the leak(s).
Generally, central air conditioner problems can be fixed without resorting to external help. Prior to calling in a professional, it is important to troubleshoot an air conditioner. Invariably, the air conditioner filter is found to be the most common issue behind the broken air conditioner scenario. When stuck in these situations, one tends to realize or understand the need for regular upkeep and maintenance of an air conditioner so that future issues can be prohibited and the quality of air improved, too.
Most homeowners usually carry out several DIY projects. Though fixing impaired air conditioners is not easy, the troubleshooting and maintenance aspect should be an easy stroll. When dealing with electrical equipment, the units power must always be off on the electrical panel.
Troubleshooting
Understanding the basics is essential to properly troubleshoot central air conditioners. The evaporator and the condenser are important components that should be learnt prior to going ahead with the troubleshooting process. Mostly, the central AC would be connected to the air distribution system. The drain lines and the evaporator coil would be at the distribution center. Generally, the condenser unit is planted on a concrete slab on the outside of the house.
Before assuming a broken AC unit, the temperature should be set lower than the houses current temperature. The power must also be on.
The AC filter is usually looked into at the end of the troubleshooting activity; however, its still very important. With a clogged filter, air flow would get restricted.
If the AC comes on but does not give the desired cooling effect, then the issue is most probably with the distribution system. Unfortunately, under these scenarios, a professional would have to be hired to fix the issue.
Cooling air ducts could also be behind the poor air flow issues. During inspection, all the connections should be checked so that they are secure and devoid of bends.
If the AC is really broken, it would rarely be a faulty compressor. Repairing a compressor can be quite expensive as the component usually does not go defunct at will.
Maintenance
As previously mentioned, the air conditioner filter is an integral aspect when it comes to unit maintenance. The AC compressor should be covered in winter and the filter replaced at least two times in a year. This would negate operational issues, such as ice-covered coils.
In case of dehumidification issues, the bigger size of the unit would most probably be the issue. The air ducts should also be checked for insulation.
Tips/Recommendations
Unfortunately, even some of the best and reliable AC units can fail. Under these circumstances, one would invariably end up spending time waiting for the mechanic to arrive, besides tackling the costly repair bill.
It is, therefore, important to keep the AC in proper working condition. Though one may not usually realize it, but heating and cooling could be among the costly home energy costs. Its essential to not overlook basic AC maintenance, so that the units efficiency is elongated.
Central ACs
If one relies on central ACs installed outside the house, usually in the yard, one must be aware that the unit makes use of the same centralized duct network that provides heat to the different areas of the house during winter. While the unit must be kept clean and cleared of overgrown plants or grass, any problem leading to inefficient cooling could be attributed to the ducts themselves.
The Ducts
One must check all the ducts throughout the house, scouting for signs of holes, obvious cracks, tears, or defects. Air could also leak at a point where two ducting sessions are joined. A duct tape can be used to seal any areas with leaks. However, this would only serve as a temporary solution to the problem. Eventually, the defective duct sections would have to be replaced entirely.
Window ACs
Based on the rooms size and the capability of the air conditioner, window ACs are typically good at cooling a single room. When broken, the problem could be a real headache. At times, the issue can be very trivial, such as the fan not being oiled properly, which can be rectified by adding little quantities of motor oil to the visible intakes. However, issues with window ACs are generally the result of grime and dirt accumulation within the unit.
Dirt and Blockage
Window units could be very sensitive to dirt and blockage, and the lack of regular cleaning and maintenance is typically the reason behind several issues people face with their air conditioning units. Prior to checking for any obvious blockage signs, the unit must be switched off and unplugged.
The Filter
The filter of a window air conditioner is located directly behind the front grille of the unit. While some of these units accessible filters or front grilles are easily detachable, other units may need a few screws to be yanked off before getting access to the filter. Even if no major issues of blockage are found, its always wise to have the filter conspicuously new with the help of a wet rag and a cleaning solution. Prior to re-installing the filter, it must be completely dried.
Calling an Expert
Window ACs could also suffer from other issues relating to a faulty thermostat or a defective fan motor. Central ACs have a variety of parts that could simply fail altogether or go bad. When in such situations, a professional would have to be contacted and the component ordering and replacement process should be initiated keeping the installation schedule in mind. While some could feel that they may tackle the part replacement process themselves, ACs mostly rely on specific components that should be specially ordered and fixed into place by the professionals.
Conclusion
The above were some of the fundamental issues and troubleshooting steps to diagnose a broken AC unit. However, there could be a gamut of many other causes behind the non-functioning of an air conditioning system. Prevention is always better than cure and with proper maintenance, any system should be able to march forward for several years.
Check to see if all the R-134a leaks out (meaning there's nothing in the loop to carry away heat). Leaks are easy to spot but not easy to fix without pulling things apart. Most auto-supply stores carry a fluorescent dye that can be added to the system to check for leaks, and it will have instructions for use on the can. If there's a bad enough leak, the system will have no pressure in it at all. Find the low-side valve and with a gauge check the PSI level.
Yellow glasses and a ultraviolet light will be needed to find leaks with dye. Electronic leak detectors are also available.
Do not use anything else to poke in the valve to see if it will come out, this is illegal. It's called venting.
If your portable air conditioner isn't working properly you might want to wait before you call a repairman and pay an expensive fee to have it fixed. Some portable AC problems can easily be repaired at home. This troubleshooting guide will help you identify what is wrong with your portable air conditioning unit and walk you through the steps to fixing it yourself.
Below are some common issues with portable air conditioners. Read the list to find which one most closely matches your problem and then follow the steps in order to fix it. Please note if you are experiencing any issues that aren't listed below or that require any electrical wiring, it is strongly recommended that you don't try to fix it yourself but rather contact a professional.
My Portable Air Conditioner Won't Start
Check that the water reservoir isn't full. Air conditioners act as dehumidifiers because they remove water from the air, which collects in buckets that need to be emptied periodically. If it's full, a float switch can interrupt power to the unit and halt operation.
Make sure that the air conditioning unit is properly plugged into the outlet. If it has an integrated circuit interrupter then make sure it hasn't been tripped. If so, press the reset button. If the reset button won't stay engaged then there is probably a problem with the wiring and you'll need to have a professional fix it. Also, make sure that the cord itself isn't damaged.
You should check the breaker to make sure the power is being supplied to the room air conditioner. If the unit is on its own circuit and a fuse is blown or the breaker is tripped then it is probably a problem with the wiring and a professional will need to fix it.
My Portable Air Conditioner Isn't Cooling Properly
My Portable Air Conditioner Doesn't Stop Running
You should make sure that the portable air conditioner isn't too small for the area that you are trying to cool. You can determine what size AC unit you need by looking at the BTU (British Thermal Unit) rating. It describes cooling capacity and the higher the BTU, the stronger the portable air conditioner. To get a quick estimate of how many BTUs you need just multiply the square footage of the room by 35 to get a rough estimate. You can also refer to our Air Conditioner BTU chart to easily find the BTU you need for your room. Be sure to account for extra sunny or shady areas, additional people in a room and kitchens.
You should make sure that all the doors and windows are closed in the area that you are trying to cool because you want to minimize the heat gain to your home. Portable ACs need to operate in a "closed" environment with air that is continuously circulated in order to work properly.
My Portable Air Conditioner Won't Blow Air
This most likely means that the fan motor is bad. You shouldn't try to fix this yourself. Contact a professional to have it fixed properly.
My Portable Air Conditioner is Leaking
Make sure that the water reservoir isn't full. In more humid climates water can collect more quickly. So how often you need to drain the water bucket depends on where you live and how much you run the portable air conditioner.
Almost all units also include the option for a drain hose and this can become stopped up, preventing the water from draining properly and leaking. So this hose may need to be cleaned or it is not properly installed.
My Portable Air Conditioner has Ice Build-up
You should turn the air conditioner off and run the fan on high speed. This will dry out the inside of the unit and remove any ice that has built up on the coils. After about 2 hours it should be completely dry.
When the ice has melted off and it is completely dry, check that the filter has been properly cleaned. For more detailed instructions on how to clean the unit, see the above section "Isn't Cooling Properly".
My Portable Air Conditioner is Making a Rattling Noise
Remove the portable air conditioner's cabinet and reposition the fan. Then tighten the screw at the center of the fan. The noise is probably caused by the fan coming in contact with the housing or coils of the unit.
After following this troubleshooting guide hopefully your portable air conditioner is running properly. If for some reason it still isn't working or you have a more complicated problem that is not listed above then you should probably contact a professional. Also, it's important to reiterate that if the issue is more complex and requires any type of electrical wiring then you should contact a professional instead of trying to fix it yourself. However, repairmen can be very expensive so you might be better off purchasing a new portable air conditioner altogether if you've had yours a while.
5 Common Portable Air Conditioner Mistakes The Green Guide to Portable Air Conditioners Best Portable Air Conditioners
Properly working heating and cooling systems are integral aspects of a comfortable home or workplace, especially during summer. One malfunction can leave you sweltering in the heat and make your home unbearable. When temperatures start to cliumb outside, the last thing you want is to find your portable air conditioner knocked out by a simple malfunction. The good news is that not every malfunction is a disaster. Though some require professional help, a great many can be resolved on your own, without the need for a technician. Before you spend any money on repairs, take some time to see if any of these simple fixes are enough to get your portable AC up and running again.
My AC Isn't Providing Enough Cooling
Portable air conditioners are ideal for cooling small areas, such as bedrooms or living rooms, or for providing supplemental cooling in places central AC systems can't reach. Because they're small units, the two primary reasons for inadequate cooling are incorrect sizing and extreme ambient temperatures.
The size of an air conditioner refers to its cooling power, not its physical proportions. Portable ACs are sized according to their BTU ratings, and if your portable AC has the wrong BTU rating for the size of the room you're trying to cool, its efficiency will be affected. A unit with too many BUTs will cause the unit to cycle off too quickly, while a unit with too few won't be powerful enough to affect the ambient temperature. To find out whether your portable air conditioner is the right size for the room it's in, meaure the length and width of the room. If your room is oddly shaped, try breaking it up into smaller shapes like squares and triangles. Calculate the area of a triangle my multiplying the base by the height and dividing in two. Once you've calculated the area, consult our portable air conditioner sizing guide so see what size air conditioner will work best in that space. If you're on the cusp of two different sizes, always choose the bigger one. It's okay to have a little more BTU than you need, just so long as it's close to the correct size.
On the other hand, if the ambient temperature is too high, it can also cause insufficient cooling. As portbale AC units release cool air out into the room, they vent hot air from the compressor outside. This constant venting causes a pressure imbalance that pulls in warm air from the other areas, including adjoining rooms and the outdoors. Normally, if the room is properly sealed and all the doors and windows are closed, the air coming is never enough to overwhelm the portable AC unit. If there's a leak, or if the ourside temperature is extremely high, the air conditioner may not be able to generate enough cold air to cool the room. Sunlight can also heat a room faster than your portable air conditioner can cool it. If temperature keeps rising, check for leaks and close the blinds. It may be enough to swing things the other way.
My Portable AC Won't Start
If your portable AC won't start, the most likely explanation is lack of power. Start by making sure the power cord is correctly plugged in and that the cord itself isn't damaged. Check the wall plug and circuit breaker as well. Try resetting the circuit at the breaker box, or changing the socket or outlet. Only after these steps have failed to resolve the problem should you take the portable air conditioner to a qualified electrician to have the fuse replaced. My Portable Air Conditioner Stops Operating On Its Own
Check to make sure the timer is not on, as an active timer can cause the unit to cease operation. Also, if the ambient temperature in your room is lower than the set temperature, this may cause your portable air conditioner to shut off. To remedy this, shut the unit down and wait for the room temperature to rise before turning the the unit back on again.
No Air Comes Out of the Air Conditioner
There are many reaons for lack of air flow. The most common cause is a clogged filter. Remove the grill in the back of the unit and clean any excess dust off the filter with a brush or a vacuum, then rinse if off with some running water. Also check for clogs in the evaporator or condenser coils, which you can see in the top compartment of the AC unit after you remove the grill and filters. If you spot any, remove them with your vacuum hose attachment.
The second reason your portable air conditioner may not be venting air is frost on the cooling coils, also known as the evaporator coils. This happens when the low temperatures around the coils causes water to condense. If the water doesn't drain properly, it can build up and freeze around the coils, hampering air flow. To check the coils the same as above. Remove the back grill and the filters and inspect the top compartment. If you see any fronst, turn the unit off and let it defrost. Once the ice has melted, normal operation should resume. Read our article on automatic defrosting and frozen AC coils to learn more.
The third reason may be the compressor has overheated. Check the hose and window unit to make sure they're still venting air properly. If the portable AC is unable can't vent the heat generated by the compressor, it will build up inside the unit and cause the compressor to shut down. Straighten the hose, remove any blockages, and position the unit further away from the window. If the it's too close, the hose can sag restrict air flow (visit our venting FAQ to learn more). Let the unit cool for 15-30 minutes and then turn it back on. Normal operation should resume.
If it doesn't, it's time to call a qualified professional. The problem may be a malfunctioning fan motor, a low refrigerant charge, a refidgerant leak, or a blown compressor. Do not attempt to repair these issues yourself. Contact a local reapir man or, if your unit's under warranty, contact the manufacturer for help.
When the air conditioner is blowing out warm air or the furnace isn't turning on, how do you know when it is time to call a repair service technician? The following do-it-yourself heating and air conditioning troubleshooting tips can help you make a sound decision.
Troubleshoot the Problem. Home equipment may stop working for a variety of reasons, and often the solution can be very simple. First, consult the owners manual for the troubleshooting section. If you dont have the owners manual, check the manufacturers website or try a website like www.consumerreports.com for a list of manufacturers contact information.
Follow the Recommendations. If the appliance issue matches the troubleshooting guide, and you are comfortable with the task, follow the recommendations provided.
Call a Service Professional. If the recommendation did not correct the issue, or if the task is beyond your comfort level, call a service professional to make the heating or air conditioning repair. A new HVAC system may cost thousands of dollars, so spending around $100 on a service call for a proper diagnosis and accurate estimate may make economic sense.
Cooling System Tips
If your central air conditioning isnt performing up to par or isnt performing at all, here are some easy troubleshooting tips that you can do (if you feel comfortable) before contacting BGE HOME for a service call.
Problem:
Troubleshooting Tips:
The compressor doesnt turn on
Check the thermostat to ensure it is in the Cool mode.
Check to ensure the outside unit is not covered or blocked.
Check the fuse or breaker to ensure it is in the On position.
Check the outside disconnect switch to ensure it is in the On position.
Check that the furnace blower motor is running (the furnace blower will run in Cool mode). If not, check the on / off switch at the furnace is in the On position.
Call BGE HOME, it could be a more technical issue.
The air conditioner runs, but isnt cool
Clear any obstructions from the vents to maximize circulation.
Check the air filter to make sure it is clean; dirty filters will slow air flow.
Check the condenser coils. For outside coils, turn the unit off, clear out the leaves or debris, and then spray the coils with water at a low pressure. For inside coils, brush and vacuum the coils until clean.
Call BGE HOME, it could be a refrigerant issue.
The air conditioner continuously runs
Move any heat-generating devices away from your thermostat; they may cause your system to cool unnecessarily.
Getting Ready for the Season: Central Air Conditioner Tips
Before turning on your central air conditioning unit every year, below are some basic maintenance tips to ensure your air conditioning season gets off to a good start.
Be sure that the condensing unit located outside is not covered up and is clear of brush. The unit needs to draw air into the system to cool inside, but the process is hindered if it cannot pull enough air. Clean obvious obstructions such as newspaper, leaves, etc. from around the exterior of the unit.
Turn the air conditioner on for a few minutes now, before you need it. That way if a problem is found, youll have enough time to schedule a service call to have a BGE HOME professional come to fix it.
Change the filters regularly. Dirty filters restrict air flow, reducing efficiency and worse case, can cause the evaporator to ice up. Disposable fiberglass filters should be replaced; electrostatic or electronic filters need to be cleaned according to manufacturer specifications.
Be sure all access panels are secure, with all the screws in place.
Be sure the thermostat is set in the cooling mode. Just setting the dial below room temperature will not activate the air conditioning if it is set in the heat mode.
Schedule a cooling system inspection with BGE HOME. Our comprehensive 15-point cooling system inspection will ensure your air conditioning system is ready for the season.
A thoroughly cleaned air conditioning unit will operate at top efficiency. However, homeowners are strongly encouraged to be extremely cautious when cleaning an outside unit, as the use of a hose and water has the very serious risk of electrical shock and possible shorting of electrical components.
Heating System Tips
If your furnace or boiler isnt performing up to par or isnt performing at all, here are some easy troubleshooting tips that you can do (if you feel comfortable) before contacting BGE HOME for a service call.
Problem:
Troubleshooting Tips:
The furnace doesnt turn on
Check the thermostat to ensure it is in the Heat mode.
Check the temperature setting is above the current indoor temperature.
Check the fuse or breaker to ensure it is in the On position.
Check the on / off switch at the furnace, or Emergency switch, is in the On position.
Call BGE HOME, it could be a more technical issue.
The furnace runs, but isnt warm
Clear any obstructions from the vents to maximize circulation.
Check the air filter to make sure it is clean; dirty filters will slow air flow.
Call BGE HOME, it could be a more technical issue.
The furnace continuously shuts off
Move any heat-generating devices away from your thermostat; they may cause your system to shut off.
Getting Ready for the Season: Furnace Tips
Before turning on your furnace unit every year, below are some basic maintenance tips to ensure your heating season gets off to a good start.
Be sure that the indoor unit is not blocked or obstructed. The unit needs to draw air into the system, so any obstructions could hinder the operation of the unit.
Turn the furnace on for a few minutes now, before you need it. That way if a problem is found, youll have enough time to schedule a service call to have a BGE HOME professional come to fix it.
Change the filters regularly. Dirty filters restrict air flow, reducing efficiency and can cause the system to work harder. Disposable fiberglass filters should be replaced; electrostatic or electronic filters need to be cleaned according to manufacturer specifications.
Be sure the thermostat is set in the heating mode. Just setting the dial above room temperature will not activate the furnace if it is set in the cool mode.
Schedule a heating system inspection with BGE HOME. Our comprehensive 13-point heating system inspection will ensure your heating system is ready for the season.
Heating & Cooling System Accessory Tips
Do It Yourself Air Cleaner Tips:
Change the filter/media in your air cleaner at least once per year.
Choose an air cleaner that uses a HEPA filter system. HEPA filters remove even extremely small particles from the air you breathe.
Do It Yourself Humidifier Tips:
Change the water pads in your humidifier unit at least once per year, either at the beginning or the end of the heating season.
Turn your humidifier on in heating season and off during cooling season (if applicable).
During extremely cold weather, your home loses humidity and can drop to as low as 5%. Optimal comfort range for humidity levels in your home is 40-55%.
If you notice condensation on the inside of your windows, the humidity setting may be too high, turn it down a couple notches.
Do It Yourself Carbon Monoxide Detector Tips:
Push the Test button at least once a month on your CO Detector Alarm to ensure it is functioning properly.
Manufacturers recommend having the CO Detector checked annually by a professional.
Duct Cleaning Tips:
Ducts should be cleaned at least every five years, or as necessary to improve the quality of the air in your home and prolong the life of your heating and air conditioning equipment.
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Look under the hood at the AC compressor clutch. If your air pressure is normal but the air is hot, you may have a compressor problem. Checking to see if the compressor clutch is engaging is a simple visual inspection. The compressor is usually located towards the front of your engine, just inside the grill of your car.
Your car should be running with the AC on to check the compressor clutch.
The compressor looks like a small motor with a large wheel on the end. The wheel (which is the compressor clutch) should be spinning. If it is not spinning, you have a problem with your compressor.[9]
A central air conditioning compressor, located outdoors, should be cleaned before every cooling season.
Save energy and money while making your home more comfortable with these DIY air conditioner repair techniques.
Need help NOW? Get a Local Air Conditioning Pro Fast!
In brief:
If your A/C doesnt work at all, be sure its receiving power at the electrical panel, then check the thermostat settings. If the air conditioner runs but doesnt cool well: 1. Turn off the power, 2. Clean or change the filter, 3. Look to see if ice has formed on the coils and, if it has, turn the power and the fan on, 4. Clean the condensate drain, 5. Check and clean the outdoor compressor.
In depth:
By keeping your AC unit working well, you can save energy and, as a result, money. If a central air conditioner is in ill repair, it probably wont work when you need it most.
In addition, if your central AC works but doesnt cool well, youre bound to use far more energy than necessary to keep your house cool.
Several different kinds of problems can occur with a central air-conditioning system.
For example, you may find your central AC :
Doesnt work at all Runs but does a poor job of cooling Allows dramatic changes in room temperature Drips or leaks water Makes strange noises
Although some central air conditioner repairs must be handled by a qualified air-conditioning repair person, in this article well look at how you can handle simple repairs and maintenance yourself.
In addition, these two articles may be very helpful for the general care and maintenance of your air conditioner: Preparing Your Air Conditioner for Summer and How to Replace Furnace & AC Filters. The latter is a job that should be handled at least twice a year, before the heating and cooling seasons.
Central Air Conditioner Doesnt Work At All
If your central air conditioner doesnt go on automatically when the thermostat signals the need for cooling, its quite likely that the thermostat isnt working properly or the unit is receiving electrical power. Before you do anything else, be sure the thermostat is set to COOL and its temperature setting is well below the ambient temperature. Then do the following:
1Check the main electrical panel and any secondary circuit panels for a tripped breaker or blown fuse. If you find the problem there, reset the breaker by turning it off and then on or replace the fuse. A central air conditioner should be on a dedicated 240-volt circuit.
2Make sure the furnace power switch is turned on and that the outdoor condensers power switch, which is mounted on the outdoor unit, hasnt been shut off. Also be sure the 240-volt disconnect next to the compressor, which is in a metal box usually mounted on the house wall, hasnt been shut off.
With this type of electronic thermostat, you pull off the body to access the baseplate and wires.
3Turn off the power to the air conditioner and check the thermostat. Remove the thermostats cover from the base (usually by pulling straight out) and replace the batteries (if it has batteries). Replace the cover and wait 3 or 4 minutes and try the system again.
4If that doesnt do the job, open the thermostat again and unscrew the wire from the Y terminal. Turn the power back on. Holding the wire by its insulation only, touch the bare end to the R terminal and hold it there for about two minutes. If the compressor kicks on, the thermostat is faulty; replace it as discussed in the article How to Install an Electronic Thermostat. If the compressor doesnt go on when you hold the two wires together, turn the power back off and call an air-conditioning technician.
Still not working? Please keep reading.
Air Conditioner Doesnt Cool Well
If you can hear your central air conditioner running, but it doesnt cool well, the problem can be caused by a couple of issues. The very first thing to do is make sure the filter in the air handler is clean so that it receives proper air flow.
1Turn off the power to the air conditioning unit.
2Remove the door on the front of the air-handler cabinet to give you access to the filter. Pull out the filter and clean or replace it as necessary.
3Look for ice. If you see ice in the area around the coils, close the unit back up, turn the power back on, and turn on the fan. The ice should melt within an hour or two.
4Clear the condensate drain. Air conditioners can create a lot of water because they remove moisture from the air. To get rid of this, they have a [usually plastic] drain pipe that comes out of the side of the air handler. Over time, algae can block this pipe and, when it does, the A/C wont work. Water is also likely to puddle around the unit or even flood the area. To deal with condensate problems, please see Air Conditioner Leaks Water, below.
5Clean the outdoor compressor. For complete instructions, please see Air Conditioner Doesnt Cool Well.
6Make sure the compressor is working. When you set the thermostat to a temperature below the room temperature, you should hear the outdoor compressor run and see the fan turning inside the top. If the fan isnt turning, look for an overload button or switch to reset (not all types have this). Stick a screwdriver down through the top grille and try to spin the fan blades clockwise. They should spin freely. If doing this gives the fan enough of a boost to get going, the unit has a faulty capacitor that must be replaced by an AC repair technician.
If none of these steps worked, the chances are pretty good that the coolant needs to be recharged by an air conditioning professional.
If your room has dramatic swings in temperature before the system kicks on, see Room Temperature Too Hot, Then Too Cold.
Air Conditioner Doesnt Blow Air
If your air handlers motor runs but the blower doesnt move air, the belt that connects the two probably has broken. Replacing it is an easy fix if you have a few tools and do-it-yourself skills. Heres how to replace the air conditioners blower belt:
1Turn off all power to the unit and, if the air handler is a gas furnace, turn off the gas at the gas valve that serves the furnace.
2Remove the door on the front of the air-handler cabinet to give you access to the blower (it might be on a slide-out drawer.) Check the number stamped on the belt and get an exact replacement from a home center or heating supply outlet.
First, fit the belt onto the motor pulley.
3You can usually slip the belt on the motors (smaller) pulley first and then start it on the blower pulley, as shown at right. Rotate the blower pulley by hand, holding the belt in place but keeping your fingers from getting caught between the belt and the pulley. The belt should slip right into place. If it seems to be too tight or difficult to set in place, it may be necessary to adjust the motor mount to provide more slack. Then you can re-tighten the tension once the belt is in place. Check the manufacturers specifications for proper tensionin most cases, the belt should deflect about an inch when you press down on it.
4Lubricate. Finally, some fan motors and fans need oiling; some have sealed bearings. If recommended by your maintenance manual, oil the bearings according to the manufacturers directions.
Air Conditioner Leaks Water
Air conditioners and high-efficiency combustion furnaces create significant condensationwere talking about a lot of water, especially in humid climatesseveral gallons per day. This water exits the air handler through plastic pipe or a drain tube. That drain tube goes directly outside, often terminating near the compressor, or to a floor drain or to a small electric condensate pump located by the air handler. Where a condensate pump is used, it connects to a 1/2-inch vinyl or rubber tube that exits outdoors or to a drain.
If water is dripping or pooling at the base of the air handler, it may be leaking from one of the plastic pipes or tubes that carry it, something may be blocking the waters flow, or the condensate pump may not be working. If the pump stops working, it will overflow.
Float switch is designed to shut off the A/C unit if the drain becomes clogged.
On some air handlers, the condensation drain pipe has a small safety float switch (see photo) connected to it. If the drain pipe backs up with water, the float switch will shut off the air conditioner. This is a sure sign that its time to clear the condensation drain pipe.
1 If your system includes an electric condensate pump, make sure it is connected to a working electrical outlet. Then look to see if the tubing that carries away the water has come loose from the pump. If it has, reconnect it. More likely is the possibility that the tube or the pump is clogged with algae. If this is the case, use a wet-dry vacuum to suck all of the water out of the tube. In some cases, it might be easier to replace it with new 1/2-inch tubing purchased online, at an HVAC supply shop, or at a well-stocked home improvement center.
The condensate pump, next to the air handler or furnace, is easy to replace. A new one costs about $50.
2Test the pump by pouring water into its collector. The pump, which is turned on by a ball float inside that rises with the water level, should start. If it doesnt, it is stuck or broken. If its stuck, you should be able to disconnect it from the power and from the inbound tubes, disassemble the top, and clean it out thoroughly. If its quite old or broken, youre probably better off replacing the pump so you dont have to do this again in the near future.
To kill algae, pour a dilute solution of bleach (1 part bleach to 16 parts water) into the pumps trough and pump it out through the tube. Dont do this on you lawnit will kill the grass.
3 If the pump runs but doesnt empty the trough, the ball-like check valve just before the discharge tube is probably stuck. Unscrew the check valve, loosen the ball inside, and look for an obstruction and a build-up of algae. If it appears that a condensation drain tube is clogged with algae, remove it if possible (you may have to cut it and replace it later with a coupling). Blow it out or run a wire through it to clear itor, better still, replace it with new tubing.
4 Ice may be blocking the tube. If this is the case, clean or change your AC filters. If the filters appear to be fine, the air conditioners refrigerant supply is probably low. Call an air-conditioning technician to have the unit recharged.
For more about filters, see How to Replace Furnace & AC Filters.
Air Conditioner Makes Noise
Though most air handlers have direct-drive motors, some older units may be belt-driven. Squealing sounds from a belt-drive air handler generally occur when the belt that connects the motor to the blower slips.
In most cases, the belt is improperly aligned or worn and needs replacement. Follow the instructions above under Air Conditioner Doesnt Blow Air (above) and refer to your owners manual.
If a direct-drive blower is squealing or making a grinding noise, shut off the unit and call an HVAC repair technicianthe motors bearings are probably shot.
Many heating/cooling ducts are metal so they conduct noise quite readily from the air-handling unit to your rooms. To break the conduction of sound, you can have a heating contractor insert flexible insulation ductwork between the heating/cooling system and the metal ductwork.
Hire a pro for complex repairs. Here, an HVAC professional checks the refrigerant levels in an air conditioning system. Get a pro now.
If you hear a pinging or popping sound coming from metal ductwork, this may be caused by thermal expansion or by air blowing past a loose flap of metal. Track along the duct runs, listening for the sound. If you find it, make a small dent in the sheet metal to provide a more rigid surface thats less likely to move as it heats and cools.
If the furnace makes rattling noises when it runs, be sure the cover panels are screwed on tight. If they arent, tighten them.
More Answers Below!
Hey, if we didnt answer you question yet, check the conversation board at the bottom of this pagelots of new answers and help there!
Getting the Work Done
If you would rather hire an air-conditioning pro to inspect and maintain your AC equipment, this FREE service will help you find a qualified local AC professional.
Call for free estimates from local pros now: 1-866-342-3263
The room air conditioner is like an entire central cooling system in one small package. There are the same components just shrunk down for the reduced duty of cooling a room instead of a home. There are "inside" and "outside" components to the room air conditioner.
Located inside the home you'll find components designed such as the evaporator coil (the one that gets cold), the fan or blower to blow cool air into the room, the thermostat, some type of filter (usually foam) and the plastic face panel.
Then there is a panel that separates the inside equipment listed above, from the equipment components located outside the window. These exterior components include the compressor, the condenser or condensing coil (looks like a radiator) and the condenser fan to blow air across and cool the hot condensing coil. The moisture condensate from the evaporator coil (inside component) drains along the bottom of a metal pan and drips to the exterior through a hole or condensate drain tube.
The whole package is neatly housed in a metal enclosure and sits partly in and partly out of your room's window.
Now let's take a look at some possible problems you may run into and how to fix them.
The central air system in your house conditions the air around you by cooling and dehumidifying warm air that is then circulated throughout your house via your network of air ducts that are usually located on the ceiling or floor. You can save yourself energy and money by learning how to maintain the air conditioner yourself. Always follow safety guidelines, like turning off the power before you attempt to repair any problems that your troubleshooting turned up.
One of the most common air conditioning problems is improper operation. If your air conditioner is on, be sure to close your home's windows and outside doors. For room air conditioners, isolate the room or a group of connected rooms as much as possible from the rest of your home. For a list of common air conditioner problems and what to look for, check out our Energy Saver 101 infographic on home cooling.
Other common problems with existing air conditioners result from faulty installation, poor service procedures, and inadequate maintenance. Improper installation of a central air conditioner can result in leaky ducts and low airflow. Many times, the refrigerant charge (the amount of refrigerant in the system) does not match the manufacturer's specifications. If proper refrigerant charging is not performed during installation, the performance and efficiency of the unit is impaired. Unqualified service technicians often fail to find refrigerant charging problems or even worsen existing problems by adding refrigerant to a system that is already full. Learn what to ask for when hiring a technician to maintain your air conditioner.
Air conditioner manufacturers generally make rugged, high quality products. If your air conditioner fails, begin by checking any fuses or circuit breakers. Let the unit cool down for about five minutes before resetting any breakers. If a central air conditioner's compressor stops on a hot day, the high-pressure limit switch may have tripped; reset it by pushing the button, located in the compressor's access panel.
Refrigerant Leaks
If your air conditioner is low on refrigerant, either it was undercharged at installation or it leaks. If it leaks, simply adding refrigerant is not a solution. A trained technician should fix any leak, test the repair, and then charge the system with the correct amount of refrigerant. Remember that the performance and efficiency of your air conditioner is greatest when the refrigerant charge exactly matches the manufacturer's specification, and is neither undercharged nor overcharged. Refrigerant leaks can also be harmful to the environment.
Inadequate Maintenance
If you allow filters and air conditioning coils to become dirty, the air conditioner will not work properly, and the compressor or fans are likely to fail prematurely.
Electric Control Failure
The compressor and fan controls can wear out, especially when the air conditioner turns on and off frequently, as is common when a system is oversized. Because corrosion of wire and terminals is also a problem in many systems, electrical connections and contacts should be checked during a professional service call.
Sensor Problems
Room air conditioners feature a thermostat sensor, located behind the control panel, which measures the temperature of air coming into the evaporative coil. If the sensor is knocked out of position, the air conditioner could cycle constantly or behave erratically. The sensor should be near the coil but not touching it; adjust its position by carefully bending the wire that holds it in place.
Drainage Problems
When it's humid outside, check the condensate drain to make sure it isn't clogged and is draining properly. Room air conditioners may not drain properly if not mounted level.
The normal thing to do when an air conditioner stops working is to call a professional contractor. However, there are cases when the problem is so minor that it can be fixed by homeowners themselves. In order to make sure that you dont call a professional air conditioning repairs service provider for a trivial issue, we suggest you follow this troubleshooting guide first.
Most AC units are equipped with a series of LED lights or an LCD display on the front panel. If the display is off, then your unit may not receive electricity. There are several scenarios that can lead to this problem.
the circuit breaker responsible with the power of your AC unit has tripped. Locate your homes breakers panel and look for tripped breakers. If any of your breakers are off, reset them and check your unit. Keep in mind that all breakers trip for a reason. Even if your unit is working after you reset the breaker that doesnt mean that your system is fine. We suggest you call for a professional air conditioning service in order to avoid future problems.
the ACs outlet is malfunctioning. The easiest way to check an outlet is to plug any sort of device which you know that its working into the outlet. If the device isnt receiving electricity, then your outlet is the culprit. Have an electrician replace it.
the units fuse is blown. Each AC unit has an internal fuse that is designed to blow when when there is a problem. Remove the front cover of your air conditioner, and check for the fuse box. Replace the fuse with one that has the same resistivity.
If after all your unit is still not working, then your circuit board is fried. However, before you make any decisions on your own, consult a professional air conditioning repairs service provider. American Traditional Mechanical is one of the best AC contractors in Lexington, KY.
If you have any problems with your heating and cooling system, dont hesitate to call us at (859) 276-1138.
The most important thing to making your central air work is to make sure it gets enough air going to it. The first place to start is to make sure that you replace your air filters on a monthly basis; you may be able to go a little longer if it is a high quality filter. This will ensure your central air gets the air it needs to circulate around the house. You will also have to make sure the area around the unit outside the house is kept free from filling up with leaves and keep the tall grass and weeds from growing up around it and shutting off the air to it. Air flow is vital to ensure your central air condensing unit works well too.
My Portable Air Conditioner is Leaking
to suck all of the water out of the tube. In some cases, it might be easier to replace it with new 1/2-inch tubing purchased online, at an HVAC supply shop, or at a well-stocked home improvement center.
Most AC units are equipped with a series of LED lights or an LCD display on the front panel. If the display is off, then your unit may not receive electricity. There are several scenarios that can lead to this problem.