BoilerFaultCodesTechnical description
Loss of flame during operation
What causes this fault?
This fault occurs when the boiler successfully lights but cannot maintain a stable flame, causing the system to shut down for safety. It is often caused by a worn-out sensing probe that can no longer detect the fire, or a problematic gas valve that isn't providing a steady fuel supply to the burner.
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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