BoilerFaultCodesYour boiler is failing to shut off the gas properly at the end of a heating cycle, which is a safety issue requiring professional inspection.
Turn off your boiler and stop using gas appliances. Call a Gas Safe engineer now — this fault can be dangerous if ignored.
Technical description: Fault: Fuel valve switch-off delay - Delayed switch-off sequence for the gas valve after the flame is extinguished
What causes this fault?
This fault occurs when the boiler's control system detects that gas is still flowing or a flame is present even after the unit has been told to shut down. The most common reason is a physical stickiness within the gas valve or a communication glitch on the main circuit board that prevents the fuel supply from being cut off instantly.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
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A boiler cover plan would cover faults like F.62 — no call-out fees, no surprises.
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Could it be time for a new boiler?
If repair costs are adding up, a new energy-efficient boiler could be the smarter long-term choice.
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