Baxi No Power / Electrical Supply Failure

Baxi water heater is completely dead, no lights or display, no response to controls.

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.

Possible Causes

Blown fuse in fused spur, Tripped circuit breaker, Loose mains terminal block in Baxi unit, Failed internal power supply on PCB

Safety: Mains voltage can kill. If unsure, call an electrician.

Steps:

Check external supply: Verify the wall switch or fused spur is on. Check the fuse and replace only with the correct rating.
Check breaker: Ensure the circuit breaker feeding the heater has not tripped.
Inspect mains cable: Look for visible damage to the cable or plug (if fitted).
Internal fuse: Some Baxi PCBs have an internal fuse. A technician should check and replace it if blown and investigate the cause.

Medium 3/5

Internal Power Supply / PCB Fuse

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