Window Air Conditioner
ambient thermistor
DID YOU KNOW: Once you turn AN air conditioner off, YOUR SUPPOSED TO leave it off for several minutes before restarting it?
DID YOU KNOW: Once you turn AN air conditioner off, YOUR SUPPOSED TO leave it off for several minutes before restarting it?
AIR CONDITIONER'S Compressor humming but not working?
AIR CONDITIONER'S Compressor humming but not working?
TRY REPLACING THE AMBIENT THERMISTOR
TRY REPLACING THE AMBIENT THERMISTOR
If you turn the air conditioner off and then back on too quickly, the pressure of the refrigerant gas rises too high; as a result, the compressor hums and won't start until the refrigerant pressure equalizes between the evaporator and condenser coils.
If you turn the air conditioner off and then back on too quickly, the pressure of the refrigerant gas rises too high; as a result, the compressor hums and won't start until the refrigerant pressure equalizes between the evaporator and condenser coils.
Other reasons the compressor is humming but not starting include a dirty or otherwise restricted condenser coil.
Other reasons the compressor is humming but not starting include a dirty or otherwise restricted condenser coil.
If your window air conditioner isn’t cooling properly, it may need a new ambient thermistor. You can replace the ambient thermistor yourself very easily following these instructions below.
If your window air conditioner isn’t cooling properly, it may need a new ambient thermistor. You can replace the ambient thermistor yourself very easily following these instructions below.
Repair difficulty
Repair difficulty
Easy
Easy
Time required
Time required
45 minutes or less
45 minutes or less
Control buttons or lights on the user interface control board can stop working. This repair guide shows how to replace it.
Control buttons or lights on the user interface control board can stop working. This repair guide shows how to replace it.
Replace the window air conditioner compressor
Replace the window air conditioner compressor
The compressor is a pump that compresses the refrigerant-Freon-that's sealed in the window air conditioner. If the compressor doesn't run when activated, have a refrigerator service technician replace it; by law, an EPA-licensed technician must do this repair because it involves Freon.
The compressor is a pump that compresses the refrigerant-Freon-that's sealed in the window air conditioner. If the compressor doesn't run when activated, have a refrigerator service technician replace it; by law, an EPA-licensed technician must do this repair because it involves Freon.
Main causes: bad compressor, lack of refrigerant, bad compressor start relay, electronic control board failure
Main causes: bad compressor, lack of refrigerant, bad compressor start relay, electronic control board failure
Main causes: clogged condensate drain, air conditioner not leveled properly, leaky window air seals
Main causes: clogged condensate drain, air conditioner not leveled properly, leaky window air seals
Main causes: lack of electrical power, bad electronic control board, wiring failure, bad temperature sensor
Main causes: lack of electrical power, bad electronic control board, wiring failure, bad temperature sensor
Main causes: clogged drain hole, air conditioner not leveled properly
Main causes: clogged drain hole, air conditioner not leveled properly
Main causes: dirty air filter, air conditioner is too small for the room, temperature set too cold, control failure
Main causes: dirty air filter, air conditioner is too small for the room, temperature set too cold, control failure
Main causes: turning the air conditioner off and the back on too quickly, dirty or restricted condenser coil, compressor failure
Main causes: turning the air conditioner off and the back on too quickly, dirty or restricted condenser coil, compressor failure