BoilerFaultCodesTechnical description
Flame Loss
What causes this fault?
This fault occurs when the boiler successfully ignites but cannot sustain or detect the flame, causing the system to shut down for safety. The most common reasons include a carbon-coated sensing probe that can no longer 'see' the fire, or an inconsistent gas supply preventing a steady flame.
This fault can be more frequent during extreme cold spells if the external gas regulator freezes or if moisture in the gas line restricts flow.
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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