E11 error and the display shows incorrect or fluctuating temperatures not matching actual cabinet temperature.

Safety: Unplug the unit before accessing sensors or PCB.

• Verify with a thermometer: Place an accurate thermometer inside the cabinet and compare to the displayed temperature after several hours of stable operation.
• Check sensor mounting: Ensure the cabinet NTC sensor is properly clipped to the evaporator cover or liner and not touching warm components or exposed to drafts from the door.
• Inspect wiring: Loose or intermittent connections can cause fluctuating readings. Reseat connectors at both sensor and PCB.
• Factory reset / calibration: If the model supports it, perform a control reset as per the service or user manual.
• Replace sensor: If readings remain unstable, replace the "Cabinet NTC temperature sensor".
• PCB replacement: If a new sensor does not resolve the issue, the analog-to-digital converter on the "Main control board (PCB)" may be faulty and the board should be replaced.