BoilerFaultCodesTechnical description
The contacts of the gas valve have been interrupted
What causes this fault?
This fault occurs when the boiler's central brain loses electrical communication with the gas valve, which acts as the fuel tap for the appliance. The most common reason is a loose connection or a break in the internal wiring, though it can also be triggered by a mechanical failure within the valve itself or a fault on the main circuit board.
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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