F5
Haier
Defrost Heater Circuit Fault (Alternate Code)
Display shows F5 and the refrigerator may not defrost properly.
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Safety Warning
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.
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Possible Causes
Open defrost heater, Failed defrost thermostat/thermal fuse, Burned heater connector, Main PCB defrost relay failure
How to Fix / Troubleshooting
Safety: Unplug the refrigerator before testing the heater. The heater is high voltage and can be very hot in operation.
Steps:
- 1. Check for frost: Heavy frost on the evaporator cover indicates defrost failure.
- 2. Access heater: Remove freezer drawers and rear panel to expose the heater.
- 3. Test heater and thermostat: Measure resistance of the heater and defrost thermostat. Replace any open components.
- 4. Inspect wiring: Repair any burned or loose connectors.
- 5. Replace PCB: If components and wiring are good but F5 persists, replace the main control board.
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Repair Difficulty
Hard
4/5
Required Part
Defrost Heater Assembly
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