BoilerFaultCodesYour boiler has detected an electrical issue with the gas valve, meaning it cannot safely control the fuel needed to create a flame.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Error with gas valve – possible no function
What causes this fault?
This fault occurs when the boiler's main computer loses electrical communication with the gas valve, which acts as the 'tap' for the fuel. The most common reason is an internal electrical failure within the valve's motor or a loose connection in the wiring that prevents the valve from opening or closing as instructed.
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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A boiler cover plan would cover faults like F.26 — 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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