Refrigerator display shows error code F0 and may beep; cooling performance may be reduced or intermittent.

Safety first: Unplug the refrigerator from the mains before removing any covers. Do not work on live circuits.

Step-by-step:

• Power reset: Disconnect the appliance from power for 5–10 minutes, then reconnect. Observe if F0 returns.
• Check for obvious wiring issues: Remove the top or rear control panel cover (depending on model) and visually inspect the wiring harnesses going to the main control board and sensors. Look for loose plugs, corrosion, or damaged insulation.
• Reseat connectors: Carefully unplug and re-plug the multi-pin connectors on the main PCB one at a time to ensure good contact.
• Check for moisture: Inspect the control area for signs of condensation or water ingress. Dry gently with a cloth and allow to air dry fully before reassembly.
• Test operation: Restore power and monitor for several hours. If F0 reappears, the main control board or a connected sensor is likely defective.

When to call a technician: If the error persists after a reset and connector check, professional diagnostics with Liebherr service software and a multimeter are recommended to identify the exact faulty component.