Liebherr
Zone Enable / Relay or Power Stage Failure
Induction cooktop powers on but none of the zones heat (no error code)
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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 main relay on power board, Software lock or demo mode, Internal DC bus failure, Multiple failed power modules
How to Fix / Troubleshooting
User steps:
- Check the user manual to ensure the cooktop is not in demo mode (often used in showrooms). Follow instructions to exit demo mode if applicable.
- Try a full power reset by switching off the breaker for 5 minutes.
Technician steps:
- Verify DC bus voltage on the power board according to Liebherr service data.
- Check the main power relay or contactor for operation when a zone is activated.
- Inspect each induction module for supply voltage and error indicators (LEDs, if present).
- Replace the main power board or affected modules if they do not energize under command.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Power Control Board
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