BoilerFaultCodesYour boiler's internal computer has developed an error and can no longer control the heating system correctly.
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
What causes this fault?
This fault occurs when the boiler's main control board suffers an internal electronic failure or loses communication with the rest of the components. The most common reasons are age-related wear to the board's circuitry or a sudden electrical surge that has damaged the sensitive microprocessors.
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.
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A boiler cover plan would cover faults like 09 — no call-out fees, no surprises.
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Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.
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