BoilerFaultCodesYour boiler is simply reminding you that its annual safety check and maintenance visit is now due.
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: Indicates that a service is due. Contact installer to arrange a service.
What causes this fault?
This is not a mechanical failure but a built-in timer that has reached its anniversary. It is triggered by the boiler’s internal clock to ensure the appliance remains safe, efficient, and compliant with your manufacturer's warranty requirements.
This code often appears in autumn as homeowners turn their heating back on and realise a year has passed since the last professional inspection.
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.
Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like Service Due — no call-out fees, no surprises.
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