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LG Air Conditioner Won't Turn Off

LWHD7000HRY7

The part(s) or condition(s) listed below for the symptom Air conditioner won't turn off are ordered from most likely to least likely to occur. Check or test each item, starting with the items at the top of the page.

Most Frequent Causes for Air conditioner won't turn off

Cause 1Condenser Coils are Dirty

The condenser coils dissipate the heat as the refrigerant passes through the coils. If the condenser coils are dirty, they won’t be able to dissipate the heat as effectively. As debris builds up on the coils, the air conditioner will become less efficient, causing the air conditioner to work harder to cool down. If the coils are significantly dirty, the air conditioner will not be able to maintain the proper temperature, and the compressor will run continuously in an attempt to cool the room. Check the condenser coils to determine if they are dirty. If the condenser coils are dirty, clean them.

Cause 2Thermistor

The thermistor is a sensor which detects the room air temperature. It is connected to the control board. If the thermistor is defective it will not have continuity when it should. If this happens the compressor runs all the time.

Parts
Thermistor for your LGAir Conditioner
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Cause 3Main Control Board

The main control board provides voltage to all of the components of the air conditioner. If there is a problem with the control board, it might not stop providing power to the compressor. Before you replace the main control board, make sure you check more commonly defective parts. If you are certain that all of the other components are working properly, replace the main control board.

Parts
Main Control Board for your LGAir Conditioner
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Cause 4Main Control Board

The main control board provides voltage to all of the components of the air conditioner. If there is a problem with the control board, it might not stop providing power to the compressor. Before you replace the main control board, make sure you check more commonly defective parts. If you are certain that all of the other components are working properly, replace the main control board.

Parts
Main Control Board for your LGAir Conditioner
Add to Cart