BoilerFaultCodesYour boiler has detected that the gas valve is not closing properly or there is a communication error between the gas valve and the control board.
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 | Cause: Leak in gas valve assembly, electronic fault
What causes this fault?
This fault occurs when the boiler detects that gas is still flowing or the valve hasn't shut properly after the flame should have gone out. The most common reason is a physical internal leak within the gas valve assembly or a communication failure where the main control board incorrectly reads the valve's position.
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.
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A boiler cover plan would cover faults like F.62 — no call-out fees, no surprises.
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