BoilerFaultCodesYour boiler has detected a problem with the way it receives gas or a communication failure within its internal control board.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Gas valve error
What causes this fault?
This fault occurs when the boiler's main control board is unable to communicate with or control the gas valve correctly. The most common reason is an internal electronic failure within the valve itself or a fault on the circuit board that prevents it from sending the necessary signals to release gas for ignition.
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.41 — no call-out fees, no surprises.
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