Refrigerator shows E4 and may stop cooling periodically; defrost cycles seem abnormal; ice builds up on evaporator.

Safety: Disconnect mains power before accessing the freezer evaporator area.

E4 usually indicates the defrost/evaporator sensor is not reading correctly.

• Access evaporator: Empty the freezer, remove drawers and the rear inner panel to expose the evaporator coil and defrost components.
• Locate sensor: The Candy evaporator NTC is typically clipped directly to the evaporator tubing or mounted in a small plastic housing touching the coil.
• Check placement: Ensure the sensor is firmly attached to the evaporator and not hanging loose or buried in ice.
• Test resistance: Use a multimeter to measure sensor resistance. At around 0–5°C (slightly above freezing), it should be in the mid–high kΩ range. Open or short readings indicate failure.
• Replace sensor if needed: Install a new Candy evaporator NTC sensor, clipping it securely to the coil. Avoid damaging the aluminum fins.
• Inspect wiring and PCB: Check the harness back to the main PCB. If wiring is intact and sensor is good, the PCB defrost circuit may be faulty and require replacement.