BoilerFaultCodesTechnical description
Interruption Of Gas Supply or Flame Failure
What causes this fault?
This fault occurs when the boiler is unable to establishes a flame after several attempts, typically because the fuel isn't reaching the burner or the spark isn't igniting it. The most common reasons include a lack of gas supply, a blocked condensate pipe, or worn-out internal components like the ignition electrodes.
This fault is much more common during freezing winter temperatures, as the external condensate pipe can freeze and back up, preventing the boiler from lighting.
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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