BoilerFaultCodesTechnical description
Interruption of gas supply
What causes this fault?
This fault occurs when the boiler's internal safety sensors detect that gas is not reaching the burner or the flame isn't staying lit. It is often caused by a closed gas meter valve, a blockage in the supply pipe, or a mechanical failure of the gas valve within the unit itself. In some cases, the boiler may simply have air trapped in the system after a period of non-use or a recent gas works.
This fault is slightly more common during the first cold snap of winter, as gas meters or external regulators can occasionally freeze or stick after periods of inactivity.
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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