Wine cooler is too warm intermittently; temperature fluctuates widely without any error code.

Safety: Unplug the unit before accessing sensors or the control board.

Steps:

• Verify with a thermometer: Place an accurate thermometer inside the cabinet to confirm actual temperature versus display.
• Inspect door gasket: Check for gaps, tears, or hardened sections. Close the door on a sheet of paper at several points; if it pulls out easily, the seal is weak.
• Check sensor mounting: Ensure the cabinet NTC sensor is firmly attached to the interior wall and not hanging loose, which can cause erratic readings.
• Reseat connectors: Remove the rear panel and reseat the sensor connector on the main PCB.
• Replace suspect sensor: If fluctuations persist, replace the cabinet NTC sensor with a Zanussi-compatible part.

Note: If replacing the sensor does not stabilize temperature, the main control board may have an intermittent fault and require replacement.