BoilerFaultCodesYour boiler has detected a problem with how it receives its gas supply, which prevents it from lighting safely.
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 fault
What causes this fault?
This fault occurs when the boiler's control board sends a signal to open the gas supply, but the valve fails to respond or the system cannot confirm that a flame has been established. The most common reason is a mechanical failure within the gas valve itself or a faulty connection in the ignition wiring that prevents the fuel from lighting. In some cases, the main circuit board may be failing to send the correct electrical instructions to the valve.
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 F14 — no call-out fees, no surprises.
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