BoilerFaultCodesYour boiler has detected that the gas valve is not closing as quickly as it should, which has caused the system to shut down for safety.
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 shut off delay error
What causes this fault?
This fault occurs when the boiler's control system detects that gas is still present or the valve hasn't fully closed after the flame should have gone out. The most common reason is a mechanical stickiness within the gas valve itself or a communication error from the main circuit board. Because this involves the flow of gas, the boiler shuts down immediately as a critical safety precaution.
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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