BoilerFaultCodesYour boiler has detected an electrical problem with the component that controls the gas supply, meaning it cannot ignite safely for heating or hot water.
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 electrical error
What causes this fault?
This fault occurs when the boiler's main control board loses proper electrical communication with the gas valve, which is the component responsible for releasing fuel into the burner. It is typically caused by a loose connection in the internal wiring, a moisture-related short circuit, or a mechanical failure within the gas valve's solenoid coils.
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 0A9 — no call-out fees, no surprises.
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Could it be time for a new boiler?
If repair costs are adding up, a new energy-efficient boiler could be the smarter long-term choice.
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