Haier Defrost Sensor Fault (Alternate Code)

Display shows F3 and the unit may have defrost-related cooling issues.

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

Open or shorted defrost sensor, Sensor not attached to evaporator, Wiring damage, Main PCB sensor input failure

Safety: Disconnect power before accessing the evaporator area.

Steps:

1. Access evaporator: Remove freezer drawers and rear panel.
2. Locate defrost sensor: Find the sensor clipped to the evaporator tubing.
3. Inspect and test: Check for damage and measure resistance. Replace if faulty.
4. Check harness: Verify continuity to the main PCB. Repair as needed.
5. Replace PCB: If all else is good but F3 persists, replace the main control board.

Hard 4/5

Defrost Sensor / Defrost Thermistor

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