Dryer displays E13; on heat pump models, may be associated with very long drying times and low heat.

Safety first: Disconnect power before accessing the lower front or rear panels. Do not damage or puncture any refrigerant lines.

• Clean heat exchanger: Remove the heat exchanger (if user-removable) and rinse thoroughly with lukewarm water. Use a soft brush to gently clean fins without bending them.
• Inspect evaporator sensor: Locate the NTC sensor clipped to the evaporator or heat exchanger. Check that it is firmly attached and not corroded.
• Test NTC sensor: Disconnect the sensor and measure resistance at room temperature. Compare to SMEG specifications. Replace the sensor if readings are out of range or intermittent.
• Check wiring: Inspect the harness from the sensor to the control board for damage or loose connectors. Repair as needed.
• Professional diagnosis: If the sensor and wiring are good but E13 persists, the heat pump refrigerant system may be underperforming. Contact a qualified technician for sealed system testing.