BoilerFaultCodesYour boiler has detected an issue with the internal valve that controls the flow of gas, causing the system to shut down for safety purposes.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Gas safety value failure
What causes this fault?
This fault occurs when the boiler's control board detects that the internal gas valve is not opening or closing correctly, or is drawing an incorrect electrical current. The most common reason is an electromechanical failure within the valve itself, though it can also be caused by a faulty circuit board sending the wrong signals to the gas assembly.
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 16 — no call-out fees, no surprises.
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