BoilerFaultCodesYour boiler’s internal control board has suffered a critical failure and can no longer safely operate the heating system.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: PCB Fault (Replace PCB)
What causes this fault?
This fault occurs when the boiler's internal computer, or PCB, suffers a mechanical or electrical failure that prevents it from communicating with the rest of the unit. The most common reasons are age-related wear and tear on the circuit components or a sudden electrical surge that has damaged the delicate tracks on the board.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Protect yourself from future repair bills
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