BoilerFaultCodesYour boiler has detected an electrical communication problem with the gas valve, which is preventing 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 control defective | Short circuit/earth (ground) leak in cable harness to gas valves, gas valve assembly defective (earth/ground leak from coils), electronic control system defective
What causes this fault?
This fault occurs when the boiler's main computer loses the ability to safely control the flow of gas into the burner. The most common reason is a breakdown in the electrical signals between the control board and the gas valve, often caused by a failing internal component or damaged wiring. Because the boiler cannot guarantee the gas valve will open or close correctly, it shuts down immediately as a safety precaution.
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 F.61 — 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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