Error code F12; SuperCool or SuperFrost functions may not operate correctly, or temperatures overshoot.
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: Disconnect mains power before accessing control electronics or internal panels.
Step-by-step:
- Reset special modes: Turn off SuperCool/SuperFrost functions via the control panel and then power-cycle the appliance for 5–10 minutes.
- Observe behavior: After restart, activate SuperCool/SuperFrost and monitor whether the error reappears immediately.
- Sensor inspection: On some Liebherr models, dedicated sensors are located near the air outlets for these functions. Inspect for damage or dislodged sensors.
- Connector check: Access the main control board and reseat connectors associated with the fast-cool circuits (refer to wiring diagram if available).
When to call a technician: If F12 persists, a technician should test the specific sensors and control relays and update or replace the control module if necessary.
Repair Difficulty
Required Part
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