Freezer display shows F0 and may beep; temperature may not be regulated correctly.

Safety first: Disconnect the freezer from mains power before removing any panels. Risk of electric shock.

Steps to try:

• Power reset: Unplug the freezer for 5–10 minutes, then reconnect. This can clear transient control board faults.
• Check display and buttons: Ensure no buttons are stuck and the touch panel is dry and clean. A stuck key can trigger undefined errors.
• Inspect wiring at the top hinge: On many Liebherr freezers, the display and sensor wiring pass through the top hinge. Remove the hinge cover and look for pinched, broken, or corroded wires. Reseat any loose connectors.
• Access main control board: Typically located at the top or rear behind a cover. With power disconnected, remove the cover and check that all plug connectors are fully seated and not burnt or discolored.

If F0 returns immediately after reset and wiring looks intact, the main control module may be defective and should be replaced by a qualified technician.