Freezer displays F3 and may not defrost correctly.

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 defrost NTC sensor, Sensor dislodged from the evaporator, Harness damage from ice, Faulty main PCB

Safety first: Unplug the freezer and wear gloves when working around sharp evaporator fins.

Access evaporator: Remove the inner rear panel to expose the evaporator coil.
Locate defrost sensor: Typically clipped to the evaporator tubing or housed in a small plastic casing.
Test sensor: Disconnect and measure its resistance at room temperature and again after cooling with ice. The resistance should change smoothly. Replace if readings are erratic or out of specifications.
Secure sensor: Ensure the sensor is firmly attached to the coil in the correct position.
Check wiring and board: Repair any damaged wires and reseat connectors. Replace the main PCB if F3 persists with a known-good sensor.

Medium 3/5

Defrost / Evaporator NTC Sensor

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