dF
Electrolux
Defrost Mode Indication / Defrost Control Fault
Freezer displays dF or DF; unit may be in or stuck in defrost mode; temperature may rise temporarily.
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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
Normal defrost cycle indication, Defrost cycle not terminating due to bad sensor, Stuck defrost relay on control board, Shorted defrost heater causing overheat
How to Fix / Troubleshooting
Safety first: Unplug the freezer before testing defrost components.
- 1. Determine if dF is normal: Some Electrolux models briefly show dF while in a scheduled defrost. If it clears within 20–40 minutes and cooling resumes, this is normal.
- 2. If dF persists: Remove the interior rear panel and check if the evaporator is warm and free of frost. A constantly warm evaporator indicates a defrost system stuck on.
- 3. Test defrost sensor and thermostat: Verify that the defrost sensor and thermostat open at the correct temperature. Replace if they remain closed when warm.
- 4. Inspect control board: If the heater is energized continuously despite correct sensor operation, the defrost relay on the control board may be welded closed. Replace the main control board.
- 5. Protect contents: If the freezer remains warm, move food to another freezer until the fault is corrected.
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Repair Difficulty
Hard
4/5
Required Part
Main Control Board
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