BoilerFaultCodesTechnical description
Flame loss
What causes this fault?
This fault occurs when the boiler's control system attempts to ignite the burner but fails to detect a stable flame. The most common reasons include a buildup of carbon on the sensing probes, an inconsistent gas supply, or a component failure that prevents the spark from starting the fire.
While this can happen year-round, it is more frequent during the first cold snap of winter when the boiler is under sudden high demand after sitting idle all summer.
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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