BoilerFaultCodesYour boiler has identified a safety issue where the gas valve remains open or is leaking gas when it should be shut off, causing it to lock out for protection.
Turn off your boiler and stop using gas appliances. Call a Gas Safe engineer now — this fault can be dangerous if ignored.
Technical description: Defective gas valve closure mechanism
What causes this fault?
This fault occurs when the boiler's control system detects that gas is still flowing into the burner even after it has commanded the unit to shut down. The most common reason is a mechanical failure where the internal seals of the gas valve become stuck open or the electronic circuit board incorrectly sends power to the valve. Because this represents a significant safety risk, the boiler will immediately stop operating to prevent an uncontrolled flame.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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A boiler cover plan would cover faults like F.62 — no call-out fees, no surprises.
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