Baxi No Power / Dead Appliance

Furnace will 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 on/off switch on furnace, Loose mains wiring at terminal block, Failed main PCB power supply section

How to Fix / Troubleshooting

Safety: Only competent persons should work on electrical circuits.

  • User checks: Verify that the mains isolator or fused spur is switched on and that the fuse has not blown. Check the consumer unit for a tripped breaker.
  • Inspect power lead: Ensure the cable to the Baxi furnace is intact and not damaged.
  • Internal checks: With power isolated, a technician can check the internal fuse on the PCB and the mains terminal block connections.
  • PCB replacement: If the PCB is not providing low-voltage power to the display or controls, it may need replacement.
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Repair Difficulty

Medium 3/5

Required Part

Main Control PCB or Mains Fuse
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