F8
Liebherr Power Supply / Low Voltage Fault

F8 error; interior light and display may flicker; unit may randomly restart or shut down.

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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

Unstable mains supply, Defective internal power supply section of main PCB, Loose power cord or terminal block connection

How to Fix / Troubleshooting

Safety first: Unplug the appliance before inspecting the power connections. Mains voltage can be lethal.

Steps:

  • 1. Check wall outlet: Test the outlet with another appliance to ensure stable power. Avoid using extension cords or multi-plug adapters.
  • 2. Inspect power cord: Look for cuts, kinks, or burn marks. If damaged, the cord must be replaced by a qualified technician.
  • 3. Access terminal block: Remove the rear cover to locate the mains terminal block or entry point. Verify that all screws are tight and there are no signs of overheating.
  • 4. Examine main PCB: Look for swollen capacitors, burnt components, or discoloration in the power supply area of the board.
  • 5. Reset and test: After checks, reconnect power and monitor for recurrence of F8.

Note: Replacement of the main control board or power module should be done by a Liebherr service technician due to safety and programming requirements.

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Repair Difficulty

Professional Required 5/5

Required Part

Main Control Board (Power Supply Section)
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