E17
Weishaupt
Power Supply / Low Voltage Fault
Display shows E17; unit may shut down with no obvious mechanical issue.
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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
Mains voltage too low, Loose power terminal connections, Internal power supply failure on control board, Shared circuit overload
How to Fix / Troubleshooting
Safety: Only qualified persons should work on mains wiring.
- Check mains connections: Verify that the live, neutral, and earth connections at the Weishaupt terminal block are tight and correctly wired.
- Measure voltage: Use a multimeter to confirm that the supply voltage is within the specified range under load.
- Dedicated circuit: Ensure the water heater is on a dedicated circuit and not sharing with heavy loads that cause voltage drops.
- Board power supply: If supply voltage is correct but E17 persists, the internal power supply on the control board may be faulty and the board should be replaced.
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Repair Difficulty
Hard
4/5
Required Part
Main Control Board
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