BoilerFaultCodesTechnical description
Flame Loss
What causes this fault?
This fault occurs when the boiler successfully lights a flame but then loses the signal needed to keep it running. The most common reason is that the internal sensors are dirty or worn out and can no longer 'see' the flame, or the gas valve is failing to maintain a steady flow of fuel.
This fault can be more frequent during hardware-straining cold snaps, particularly if a partially blocked condensate pipe causes the combustion chamber to flood and extinguish the flame.
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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