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Michael
June 23, 2023
unit come on but just hum like the compressor not starting up.
For model number FFRH1822Q20
Hello Michael, thank you for reaching out. 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 to include a dirty or otherwise restricted condenser coil or the short cycling of the compressor, part number PS2379509. We hope this information is useful!
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I bought both PC BOARDS and the 3 thermostats even tho I read that cleaning the thermostats will sometimes work. Installed thermostats but still blew hot. Installed push button control module because wife said the buttons don't always work, still blows hot. Slide out A/C from frame about 8 inches, remove 4 screws that hold top cover. All the wires and thermostat connectors must be removed to get main control module out. I took lots of pictures and made my own wiring diagram with notes. The wire connectors look like regular push type, but they do have a release tab that can be pushed with needle nose plyers. Remove screws holding module, and do everything in reverse. Yes, the A/C works properly now. I spent an extra $110 for the thermostats and push button control, but am very happy it works and didn't have to buy a new A/C.
Removed Window Air Conditioner from box purchased New. Plastic Fan Blade was broken when purchased and Appliance store would not repair. Second phase removed cover from the fan area removed and replaced fan blade replaced cover and reinstalled unit into the window case.
