F12
Liebherr
Program Memory / EEPROM Fault
Dryer displays F12 and may not respond to program selection or start commands.
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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
Corrupted firmware on main control PCB, Failed EEPROM memory chip, Voltage spike damage to control electronics
How to Fix / Troubleshooting
Safety first: Unplug the dryer before any disassembly.
- Power cycle: Disconnect power for at least 10 minutes to allow the control to fully discharge. Restore power and check if F12 clears.
- Check supply quality: Ensure the dryer is connected to a stable power source, not a heavily loaded extension lead. Voltage fluctuations can corrupt memory.
- Inspect control board: Remove the top cover and access the main control PCB. Look for obvious damage such as burnt components or corrosion.
- Firmware update: Some Liebherr models allow firmware reprogramming via service tools. This must be performed by an authorized technician.
- Replace control board: If F12 persists and reprogramming is not possible, the main control PCB will typically need replacement.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control PCB
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