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Parts by Appliance
Home > Repair Help > Room Air Conditioner Repair Help > Room air conditioner not cooling

Room air conditioner not cooling


The most common parts and conditions which contribute to the symptom "Room air conditioner not cooling" are listed below. Check or test these items and use the available how-to links to learn more.


Enter your model number in the search bar above to find parts for your room air conditioner. 











Air Filter

The air filter is an important part of your air conditioning unit because it filters out debris from the air you’re breathing in. If your filter hasn’t been changed in a while, the flow of air may become restricted, causing less cooling to take place. Check your air filter to determine if it is clogged and replace if needed.









The air conditioner thermostat regulates the temperature of the air being produced. When the temperature of the room reaches above a set point, the thermostat actuates a switch to turn the compressor and fan motor on to begin cooling. To decide if your thermostat is broken, turn your unit on and use a multimeter to test its continuity. If your thermostat does not have continuity, then it might not be turning the air conditioner on when it’s needed and will need to be replaced.







The thermistor is attached to the control board and is used for sensing the air temperature. If the thermistor is not taking accurate temperature readings, it could be causing the unit to not cool properly. To decide if the thermistor is the issue, use a multimeter to test it for continuity.








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Attempting to work on appliances that have live energy sources can lead  to serious bodily injury or even death. To prevent such injuries, always remove the appliance from its power source before ...

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