F15
Liebherr Power Supply / Voltage Monitoring Fault

Display shows F15; the refrigerator may not start cooling after a power outage or may shut down unexpectedly.

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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.

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Possible Causes

Faulty power supply section on main PCB, Brownout or unstable mains voltage, Loose mains connection at terminal block, Surge damage to control electronics

How to Fix / Troubleshooting

Safety first: Unplug the appliance. Do not open sealed electronic modules if you are not qualified.

Step-by-step:

  • Check outlet: Verify the wall outlet with another appliance or a tester to ensure stable voltage.
  • Inspect power cord: Look for cuts, burns, or kinks in the Liebherr power cord.
  • Terminal block check: Remove the rear cover and inspect the mains terminal block on the refrigerator for loose screws or signs of overheating.
  • Power reset: Leave the unit unplugged for 15 minutes, then reconnect. If F15 reappears quickly, the internal power supply is likely faulty.

When to call a technician: Replacement of the main control board or power module should be done by a professional due to mains voltage hazards.

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Repair Difficulty

Professional Required 5/5

Required Part

Main Control Board / Power Supply Module
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