GE Profile
Defrost System Failure – Evaporator Iced Over
Thick ice sheet on back wall or behind interior panel
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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 on main board, Defective evaporator thermistor
How to Fix / Troubleshooting
Safety first: Unplug the freezer before removing panels. Avoid damaging refrigerant lines.
- Remove interior panel: Take out shelves and the rear panel to inspect the evaporator coil.
- Assess frost pattern: If the entire coil is encased in solid ice, the defrost system is likely not working.
- Manual defrost: Use a hair dryer on low or bowls of hot water to gently melt ice. Do not overheat plastic parts.
- Test defrost components: With ice removed, test the defrost heater and thermostat for continuity. Replace any open components.
- Control board check: If heater and thermostat are good, the main control board 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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