GE air conditioner displays F3 and may not regulate temperature correctly

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Failed outdoor thermistor, Sensor wiring open or shorted, Connector corrosion, Defective main control board

Safety: Unplug the unit and remove it from the window or sleeve if necessary.

Steps:

Remove cabinet: Take off the outer shell to access the condenser coil and compressor area.
Locate outdoor sensor: Find the thermistor attached to the condenser coil or near the compressor.
Inspect and secure: Ensure it is properly attached and wiring is intact.
Test sensor: Measure resistance and compare to GE specs. Replace if out of range.
Check board: If sensor is good and wiring is intact, replace the main control board.

Hard 4/5

Outdoor Temperature Sensor (Condenser Thermistor)

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