De Dietrich
No Power / Electrical Supply Fault
Boiler does not start at all, no display or lights
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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
Blown fuse, tripped circuit breaker, faulty boiler on/off switch, failed main PCB power supply section
How to Fix / Troubleshooting
Safety: Electrical work must comply with local regulations. If unsure, contact an electrician or heating engineer.
- Check mains supply: Verify that the boiler's fused spur or plug is switched on and the fuse is intact. Replace with the correct rating if blown.
- Check consumer unit: Ensure the circuit breaker feeding the boiler has not tripped.
- Inspect power switch: If the boiler has an integral on/off switch, ensure it operates correctly and is not loose or broken.
- Technician tasks: A professional should test incoming voltage, internal fuses, and the main control PCB power supply. Replace the PCB if dead.
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Repair Difficulty
Medium
3/5
Required Part
Main Control PCB
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