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Why does my window air conditioner's compressor hum but not work?

less than a minute readJun 04Lyle Weischwill
image of room-air-conditioner

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 room-air-conditioner problem

JC-WAC-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.

Window air conditioner compressor

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