Digital display shows E1 and cabinet is not cooling properly or temperature is unstable.

Safety first: Unplug the wine cooler from the mains before removing any panels. Do not work on live circuits.

This code usually indicates a fault with the cabinet temperature probe (NTC) used by De Dietrich wine coolers to regulate temperature.

• Access the sensor: Open the cabinet and locate the temperature sensor usually clipped to the rear liner or side wall behind a small plastic cover or routed through the rear panel.
• Inspect wiring: Check the sensor lead for cuts, pinches, or signs of moisture ingress. Ensure the plug at the sensor and at the main control board is fully seated and not corroded.
• Test the sensor: With a multimeter set to resistance (ohms), measure the NTC at room temperature. Typical NTCs read between 5–20 kΩ at ~25°C. If it reads open (OL) or near 0 Ω, the sensor is defective.
• Check the connector on the PCB: Remove the top or rear service panel to access the main control board. Verify the sensor connector is clean and firmly attached.
• Replace if faulty: If readings are out of spec or intermittent when you gently flex the cable, replace the cabinet NTC sensor with a compatible De Dietrich part. Route the new sensor along the original path and secure it away from evaporator fins.
• Power up and test: Reassemble panels, plug the unit back in, clear the error by powering off/on, and monitor temperature stability for several hours.