Electrolux Defrost Heater or Circuit Fault

Refrigerator displays F4 fault code; defrost operation may be abnormal.

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.

Possible Causes

Open defrost heater, Failed defrost thermostat, Loose heater wiring, Main control board defrost relay failure

Safety first: Disconnect power before testing.

Access evaporator: Remove freezer rear panel.
Test heater: Measure continuity across the defrost heater terminals. Replace if open.
Check thermostat: Test continuity when cold; replace if open.
Inspect wiring: Repair any burned or loose connectors.

Hard 4/5

Defrost Heater

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