BoilerFaultCodesYour boiler has detected a technical communication error between the main control board and the gas valve, 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 faulty: Short-circuit to mass in cable harness to the gas valves, installation fault on gas valve (short-circuit, mass short in the coils) electronics faulty
What causes this fault?
This fault occurs when the boiler's main internal computer loses the ability to safely control the flow of gas. It is usually caused by a physical electronic failure within the gas valve or a loose connection in the wiring that prevents signals from reaching the burner. Because the system can no longer guarantee the 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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