BoilerFaultCodesTechnical description
Main PCB / Display PCB fault
What causes this fault?
This fault occurs when the boiler's main control board loses the ability to send or receive electronic signals from the display screen panel. It is usually caused by a loose internal connection or a microscopic failure in the electrical circuits on one of the boards. Without this constant 'handshake' between components, the boiler cannot verify that the settings are safe and will stop working immediately.
Engineer required
This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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