Window Air Conditioner: Why does my window air conditioner's compressor hum but not work?
If you turn the window 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. When you turn the air conditioner off, leave it off for several minutes before restarting it.
Other reasons the compressor is humming but not starting include a dirty or otherwise restricted condenser coil or the short cycling of the compressor.
THESE REPAIRS MAY HELP SOLVE YOUR WINDOW AIR CONDITIONER PROBLEM
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.
Window air conditioner compressor
Symptoms for window air conditioners
Repair guides for window air conditioners
These step-by-step repair guides will help you safely fix what’s broken on your window air conditioner.
If your window air conditioner isn’t cooling properly, it might need a new ambient thermistor. You can replace it yourself following these instructions.
If the condenser fan blade is broken or the condenser fan motor won’t run, you can replace the broken parts yourself by following these instructions.
The electronic control board is the brain of your window air conditioner. Here’s how to replace it.
Articles and videos common to all room air conditioners
Use the advice and tips in these articles and videos to get the most out of your window air conditioner.
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