BoilerFaultCodesYour boiler is simply letting you know that its annual routine service is now due to ensure it continues running safely and efficiently.
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: Service reminder
What causes this fault?
This code appears because the boiler's internal clock has calculated that 12 months have passed since its last professional maintenance check. It is a programmed timer meant to prompt you to book a Gas Safe engineer to keep your warranty valid and the system safe. The boiler hasn't actually broken down; it is simply a proactive reminder to ensure the internal components are cleaned and tested.
This code often appears in autumn as many homeowners have their annual service completed just before the heating season begins.
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 SR — no call-out fees, no surprises.
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