6 Window Air Conditioner Problems to Look Out for

Window AC.

If you own a window AC unit, you may be curious about the various types of air conditioner problems you stand to encounter. If so, read on to learn everything you'll need to know about common air conditioner problems.

Strange Noises

Odd noises are a very common air conditioner problem. If you notice any loud wailing noises emanating from your AC unit, the device's fan belt is usually the culprit. If the fan belt has simply been dislodged, positioning back into place should solve the problem. If the fan belt has sustained considerable damage, however, you may need to replace it in order to put an end to the noise.

Low Refrigerant

Low refrigerant levels in your air conditioner are usually the result of a leaky AC unit. If you suspect this to be the case, you will need to incorporate the aid of an air conditioning specialist. Another possible cause of low refrigerant levels is an insufficient amount of refrigerant having been added to your AC unit at the time of the device's installation. Should this prove to be the case, you will need to consult your air conditioner's owner's manual in order to determine the proper amount of refrigerant for the device. Keep in mind that too much refrigerator stands to cause problems of its own.

Pungent Odors

Pungent odors are another common air conditioner problem. Bad smells are generally caused by large buildups of moisture in your AC unit. As air conditioners are frequently transitioning between heating and cooling, this readily gives way to the formation of moisture. This problem can generally be avoided by frequently cleaning your air conditioner's filter and changing it accordingly.


If your air conditioner's grills are blocked, you'll need to clean the device's motor, fins, and fan. Thoroughly wipe down the aforementioned parts with a clean washcloth. Make sure not to dampen the washcloth, however, as these parts should not get wet. Also, to err on the safe side, make sure your AC unit is unplugged before administering the cleaning. Once the parts have been sufficiently cleaned, blockage should no longer be a problem.

Thermostat Issues

If your air conditioner's thermostat sensor becomes dislodged, your AC unit's temperature may begin to fluctuate rapidly. If you suspect this to be the case, carefully restore your thermostat sensor to its proper position, making sure it doesn't come into contact with your air conditioner's coil.

Coil Problems

Faulty coils are liable to prevent the air emitted by your AC unit from properly circulating. To combat this issue, frequently check your air conditioner's condensate drain for any clogs. In addition, take care not to allow significant amounts of dirt and debris to build up on your coil, as this also stands to damage the device's compressor and fan. As is the case with the previously discussed air conditioner problems, make sure your AC unit is safely unplugged before attempting to check its coil.