BoilerFaultCodesYour boiler's internal computer brain has suffered a memory error and can no longer process the data it needs to run safely.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: EEPROM fault
What causes this fault?
This fault occurs when the boiler's main control board suffers a critical memory failure, meaning it can no longer read or store the vital settings required to operate. It is usually caused by an internal electrical component failing due to age or a sudden power surge that has corrupted the circuit board's data.
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 F.63 — no call-out fees, no surprises.
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