BoilerFaultCodesYour boiler's internal computer has encountered a critical error and can no longer control the heating system safely.
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 a hardware failure or a breakdown in its internal memory. It is often caused by unexpected electrical surges, moisture getting into the casing, or simply the components wearing out over many years of use.
This issue is more frequent during the winter months when the boiler is working under higher load and electrical components are more susceptible to failure during power fluctuations or storms.
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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