Safety: Unplug the Zanussi refrigerator before accessing the freezer evaporator area.

How to check:

Empty and access evaporator: Remove freezer drawers and the rear inner panel to expose the evaporator coil and attached sensor.
Defrost if necessary: If the evaporator is heavily iced, allow it to defrost fully (leave doors open, towels at the base). Do not chip ice with sharp tools.
Locate the evaporator NTC: It is usually clipped to the evaporator tubing or housed in a small plastic sleeve attached to the coil.
Inspect wiring and clip: Ensure the sensor is firmly clipped to the coil and the wiring is intact and not brittle or cut.
Test the sensor: Disconnect the sensor and measure resistance. Compare to expected NTC values. Replace if open, shorted, or far out of range.
Check connection at PCB: Trace the harness to the rear control board and verify the connector is secure.
Reassemble and test: After replacing the sensor, reassemble panels, restore power, and monitor for reoccurrence of E3.

Note: If E3 persists with a known-good sensor and wiring, the main PCB may be defective and should be replaced by a professional.

Display shows E3 and fridge compartment temperature fluctuates or defrost seems irregular

Possible Causes