BoilerFaultCodesYour boiler's internal computer has suffered a technical failure and is unable to communicate with its own components.
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 critical internal hardware failure, meaning it can no longer send or receive instructions from parts like the pump or gas valve. The most common reason is age-related wear on the delicate electrical circuits or a sudden power surge that has damaged the board's memory chip.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
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A boiler cover plan would cover faults like 415 — no call-out fees, no surprises.
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