Amana
Defrost System Failure
Thick ice buildup on the evaporator cover and behind the rear interior panel; airflow is restricted.
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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 control in main board, Broken wiring in defrost circuit
How to Fix / Troubleshooting
Safety: Unplug the freezer before accessing the evaporator. Avoid contact with sharp fins.
Steps:
- Manual defrost: Remove food, take off the rear interior panel, and carefully melt ice with a hair dryer on low. Do not pry ice with tools.
- Test defrost thermostat: With the thermostat cold, check for continuity. Replace if open.
- Test defrost heater: Measure resistance across the heater terminals. Replace if open.
- Inspect wiring: Repair any burnt or broken wires in the defrost circuit.
- Control board: If heater and thermostat are good, replace the main control board, which controls defrost timing.
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Repair Difficulty
Hard
4/5
Required Part
Defrost Heater
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