Wine cooler not cooling properly; temperature rises above setpoint and display shows E1.

Safety first: Unplug the wine cooler or switch off the circuit breaker before removing panels or touching internal wiring.

Steps to check and address E1:

• Power reset: Disconnect power for 5–10 minutes, then restore power. If E1 returns, continue.
• Locate the cabinet NTC: Inside Neff wine coolers, the cabinet temperature sensor is usually behind a small plastic cover on the rear interior wall or side wall. Remove shelves carefully to access it.
• Inspect the sensor and wiring: Check for broken insulation, pinched wires, or signs of moisture ingress around the sensor head. Ensure the connector is firmly seated on the sensor and on the main control board.
• Clean and dry: If there is condensation, gently dry the area with a soft cloth. Do not use a heat gun or hair dryer inside the cabinet.
• Test continuity (for advanced DIYers): With the unit unplugged, disconnect the NTC from the main board and measure resistance with a multimeter. Compare to typical NTC values (e.g., ~5–15 kΩ at room temperature). An open circuit or 0 Ω indicates a failed sensor.
• Replace the sensor if faulty: Order a Neff-compatible cabinet NTC sensor using your model number. Remove the old sensor (often clipped or lightly glued in place), route the new sensor along the same path, and reconnect to the control board.
• If E1 persists: The main control PCB may be misreading the sensor and require replacement. This is best handled by a Neff-authorized technician.