BoilerFaultCodesYour boiler's computer control board has developed an internal electrical error, preventing the system from operating correctly.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Internal fault (PCB)
What causes this fault?
This fault occurs when the boiler's main control board experiences an internal communication failure or a malfunction in its electronic circuitry. The most common reason is general component fatigue over time, though it can also be triggered by a sudden electrical power surge that damages the board's sensitive processors.
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 E05 — no call-out fees, no surprises.
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