Westinghouse
No Defrost / Defrost System Failure
Heavy frost buildup on the evaporator cover and walls; airflow is restricted and cooling performance drops.
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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, Open defrost thermostat, Faulty defrost sensor, Defective control board defrost timer
How to Fix / Troubleshooting
Safety: Unplug the freezer. Frosted components can be slippery and sharp.
Steps:
- Manual defrost: Remove food, open the door, and allow all frost to melt. Use towels to catch water. Do not chip ice with tools.
- Access defrost components: Remove the rear inner panel to expose the evaporator, heater, and thermostat.
- Test heater and thermostat: Use a multimeter to check continuity of the heater and defrost thermostat (when cold). Replace any open components.
- Check wiring and control: Inspect wiring to the control board. If components are good, the control board may not be initiating defrost and should be replaced.
- Reassemble and monitor: After repair, monitor for several days to ensure frost does not return.
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Repair Difficulty
Hard
4/5
Required Part
Defrost Heater
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