Refrigerator display shows E0 and cooling performance is reduced or intermittent.

Safety first: Unplug the refrigerator from the mains before removing any panels or handling wiring. Do not work on live circuits.

This code on many SMEG refrigerators indicates a problem with the refrigerator compartment temperature sensor (NTC).

• Step 1 – Power reset: Unplug the appliance for 5–10 minutes, then plug back in. If E0 returns after a few minutes of operation, continue.
• Step 2 – Check sensor location: Open the fresh-food compartment and locate the small plastic cover or housing on the rear or side wall where the temperature sensor sits (often near the air outlet grille). Inspect for ice buildup or moisture. If iced over, fully defrost the fridge for 24 hours with doors open and then test again.
• Step 3 – Inspect wiring: With power disconnected, remove the inner cover (usually held by clips or small screws). Gently pull out the sensor probe and inspect the two-wire harness for cuts, corrosion at the connector, or loose pins. Reseat the connector at both the sensor and the main harness junction.
• Step 4 – Basic resistance check (for advanced DIYers): Using a multimeter set to resistance, measure the NTC sensor at room temperature. Typical SMEG NTC sensors read between 5–20 kΩ at ~25°C (check your service manual for exact value). An open circuit (infinite) or near 0 Ω indicates a failed sensor.
• Step 5 – Replace sensor if faulty: If readings are out of range or the sensor is physically damaged, replace the refrigerator compartment NTC sensor with a compatible SMEG part. Route the new sensor along the original path and ensure the probe is fully seated in its well.
• Step 6 – Consider PCB fault: If a known-good sensor and wiring are in place but E0 persists, the main control board input may be defective. At this point, professional diagnosis is recommended.