BoilerFaultCodesTechnical description
Flame Loss
What causes this fault?
This fault occurs when the boiler's control system loses the signal that a flame is present, causing it to shut down for safety. The most common reasons are a worn-out sensor that can no longer 'see' the flame, or a physical issue like an unstable gas supply or a blocked flue preventing a clean burn.
This fault is more common during extreme cold spells, as freezing temperatures can affect gas pressure or cause the condensate pipe to ice up, leading to a flame failure.
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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