Technical description
Telephone a heating engineer
What causes this fault?
This message is triggered by an internal timer or a specific number of burner operating hours set by a previous engineer. It physically indicates that the boiler has reached its scheduled maintenance interval and requires a safety inspection rather than being a sign of a mechanical breakdown. The status is designed to ensure the appliance continues to run efficiently and safely through preemptive servicing.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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