Error code F8; compressor may not start or may run continuously; cooling performance is abnormal.

Safety first: Unplug the refrigerator. Work on compressor and inverter only if you are experienced; high voltages are present.

Step-by-step:

• Listen for compressor: After restoring power briefly, listen at the back of the unit. If the compressor does not start or clicks repeatedly, there may be an inverter or compressor issue.
• Inspect inverter module: Remove the rear lower cover to access the compressor and attached inverter module. Look for burn marks, melted plastic, or a burnt smell.
• Check wiring: Verify that the multi-pin connector between the main control board and inverter is fully seated and undamaged.
• Power reset: Disconnect power for 10 minutes, then reconnect and observe if F8 returns immediately or after a short run.
• Do not bypass safety circuits: Do not attempt to hard-wire the compressor; this is dangerous and can cause further damage.

When to call a technician: F8 typically requires professional diagnosis with proper tools to test the inverter and compressor windings. A certified Liebherr technician should handle replacement of the inverter module or compressor.