Display shows F3; defrost cycles may be abnormal and frost may build up

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 or shorted evaporator thermistor, Loose thermistor clip on coil, Damaged harness to evaporator area, Control board sensor input failure

Safety first: Disconnect power and wear gloves when working near sharp metal edges.

Access evaporator area: Remove interior rear panel to expose the evaporator coil.
Verify sensor mounting: Ensure the evaporator thermistor is properly clipped to the coil or bracket and not dangling.
Check continuity: Test the thermistor at known temperature. Replace if open, shorted, or reading far from specification.
Inspect harness: Follow the wires back to the main harness and look for damage or loose connectors.

Hard 4/5

Evaporator Thermistor

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