Remeha No electrical power to boiler

Boiler does not start at all, no lights or display

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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 in fused spur, Tripped circuit breaker, Faulty mains cable or isolation switch, Failed main PCB power supply section

How to Fix / Troubleshooting

Safety first: Only work on electrical circuits if you are competent. Otherwise, contact an electrician or heating engineer.

  • Check fused spur: Ensure the boiler's fused spur is switched on and the fuse (usually 3A) is intact. Replace only with the correct rating.
  • Check consumer unit: Verify that the circuit breaker feeding the boiler has not tripped.
  • Inspect power cable: Look for obvious damage to the boiler's mains cable and isolation switch.
  • Engineer tasks: Test for 230V at the boiler terminals, check internal fuses on the PCB, and replace the PCB if the power supply section has failed.
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Repair Difficulty

Medium 3/5

Required Part

Main Control PCB
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