BoilerFaultCodesTechnical description
PCB error
What causes this fault?
This fault occurs when the boiler's main control board experiences an internal electronic failure or a corruption of its memory. It is typically caused by aging electrical components reaching the end of their lifespan or damage from an unexpected electrical power surge. When this happens, the brain of the boiler can no longer safely coordinate the sequence of ignition and operation.
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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