Freezer shows F8; alarm may sound; unit may not cool properly; compressor may be off.

Safety first: Unplug the appliance and allow hot components to cool before touching.

Steps:

• Clean condenser: Access the rear of the freezer and locate the condenser (metal grille or coil). Use a soft brush and vacuum to remove dust and lint. Blocked airflow can cause overheating and sensor errors.
• Locate condenser sensor: On Liebherr freezers, a small NTC sensor may be clipped to the condenser or near the compressor discharge line.
• Inspect sensor and wiring: Check for melted insulation, loose clips, or damaged wires from heat.
• Test sensor: With the unit cool and unplugged, measure resistance and compare to typical NTC values. An open or shorted sensor must be replaced.

Remedy: Replace the condenser temperature sensor if faulty. Ensure it is firmly attached to the correct location and that the condenser area has good ventilation.