BoilerFaultCodesYour boiler’s internal computer has encountered a critical electronic 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: Internal failure - electronic
What causes this fault?
This fault occurs when the boiler's main control board suffers a hardware failure, meaning it can no longer send or receive instructions to vital components like the gas valve or pump. It is usually caused by electrical component degradation over time or a sudden power surge that damages the delicate circuitry on the PCB.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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A boiler cover plan would cover faults like 441 — no call-out fees, no surprises.
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