BoilerFaultCodesTechnical description
Interruption Of Gas Supply or Flame Failure
What causes this fault?
This fault occurs when the boiler attempts to ignite but fails to establish or maintain a stable flame. The most common reasons are a temporary interruption in the gas supply, a blocked burner, or an ignition probe that has become worn and can no longer sense the heat from the flame.
This fault is more frequent during freezing winter spells, as the boiler's external condensate pipe can freeze and back up, preventing the unit from lighting successfully.
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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