BoilerFaultCodesTechnical description
Gas valve error due to opening period without flame – try resetting the boiler.
What causes this fault?
This fault occurs when the boiler's control system attempts to light the gas multiple times but fails to detect a sustained flame. The most common reasons are a faulty gas valve that isn't releasing fuel correctly, or a worn ignition electrode that is unable to produce the spark needed to start the combustion process.
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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