Display shows AL or flashes temperature with an alarm symbol; interior is too warm.
Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
Possible Causes
How to Fix / Troubleshooting
Safety first: Basic checks can be done with power on, but unplug the unit before removing rear covers.
Steps:
- 1. Acknowledge alarm: Press the alarm/OK button to silence the buzzer. Note the displayed temperature.
- 2. Check door and seal: Ensure the door closes fully and the gasket seals all around. Correct any obstructions.
- 3. Verify ventilation: Confirm that installation clearances match Liebherr specifications and that ventilation grills are not blocked.
- 4. Clean condenser: Unplug the unit, remove the rear lower cover, and gently clean dust from the condenser coils.
- 5. Allow recovery time: After heavy loading or a warm start, the unit may need 12–24 hours to reach set temperature. Monitor the temperature trend.
Call a technician if the temperature does not drop despite continuous running, as this may indicate a sealed system issue (refrigerant leak, blocked capillary, or failing compressor).