BoilerFaultCodesTechnical 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 →