Wine cooler not cooling properly, temperature rising above setpoint, E1 displayed on control panel.

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

Steps to check and address E1:

• Power reset: Disconnect power for 5–10 minutes, then reconnect. If E1 clears temporarily and returns, the sensor or wiring is likely faulty.
• Locate the cabinet NTC: Inside the wine compartment, look for a small plastic cover or probe usually on the rear or side wall. On some Zanussi models it is behind an interior panel.
• Inspect wiring: Remove the interior cover (usually a few screws). Check the sensor wires for cuts, pinches, or signs of moisture damage. Ensure the connector is firmly seated on the sensor and at the main PCB end (usually behind the rear lower service panel).
• Test the sensor: With a multimeter set to resistance (ohms), measure across the NTC leads. At room temperature (around 20–25°C), most Zanussi NTCs read between 5–20 kΩ. An open circuit (OL) or 0 Ω indicates a failed sensor.
• Check at the PCB: Remove the rear service panel, locate the main control board, and verify continuity from the sensor connector to the board. Repair or replace any damaged harness.
• Replace the NTC: If readings are out of spec, replace the cabinet temperature sensor with a Zanussi-compatible NTC probe. Route the new sensor along the original path and secure it away from moving parts and sharp edges.
• Reassemble and test: Refit all panels, restore power, clear the error (if the model allows), and monitor temperature for several hours.

When to call a technician: If the sensor and wiring test good but E1 persists, the main control PCB may be defective and should be diagnosed and replaced by a qualified technician.