Hoover
Automatic Defrost System Failure
Heavy frost build-up on evaporator cover and food, requiring frequent manual defrosting.
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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
Failed defrost heater, Defective defrost thermostat or sensor, Faulty defrost control on PCB, Door gasket leaking warm moist air
How to Fix / Troubleshooting
Safety: Unplug the freezer before accessing the evaporator and electrical components.
- Manual defrost first: Fully defrost the freezer to restore airflow and allow accurate testing.
- Test defrost heater and thermostat: Access the evaporator and follow the defrost heater and thermostat testing steps (see F4 and E4 scenarios). Replace any open-circuit components.
- Check door seal: Inspect and replace the door gasket if it is torn or not sealing properly.
- Verify PCB control: If heater and thermostat are good but no defrost cycles occur, the main PCB may not be initiating defrost and may need replacement.
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Repair Difficulty
Hard
4/5
Required Part
Defrost Heater
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