BoilerFaultCodesTechnical description
Gas valve stepping motor fault.
What causes this fault?
This fault occurs when the boiler's control board loses communication with the small motor that regulates gas flow into the burner. The most common reason is that the motor inside the gas valve has physically seized or suffered an electrical failure, meaning it can no longer open to let fuel through. Occasionally, a loose connection or moisture on the wiring harness can also prevent the signal from reaching the valve.
Engineer required
This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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