BoilerFaultCodesYour boiler is simply reminding you that it has been over a year since its last professional health check and it is now due for an annual service.
This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.
Technical description: When the boiler has run for more than 1 year.
What causes this fault?
This is not a mechanical failure but a built-in timer notifying you that 12 months have passed since the last maintenance visit. The boiler tracks its own run-time and calendar days to ensure vital safety checks and cleaning are performed by a professional on schedule.
This notification often appears in autumn as homeowners turn their heating back on for the first time, triggering the completion of a full annual cycle.
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 Service Required — no call-out fees, no surprises.
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