Baxi No Power to Boiler / Internal Fuse or PCB Failure

Boiler display is blank, no lights or response, but mains power is present at the property

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 internal fuse on Baxi PCB, Faulty main PCB, Loose connection at boiler terminal block, Faulty fused spur or isolation switch

Safety first: Electrical work should be done by a competent person.

User checks:

Confirm the fused spur is switched on and the fuse (typically 3A) is intact. Replace the fuse if blown, but if it blows again, do not continue.
Check any external isolation switches or circuit breakers feeding the boiler.

Professional actions:

An engineer or electrician will check for 230V at the boiler terminals, inspect and replace any internal fuses, and test the PCB.

Medium 3/5

Main PCB (Control Board)

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