BoilerFaultCodesTechnical description
Ignition lockout
What causes this fault?
This fault occurs when the boiler tries to ignite three times but fails to detect a stable flame, leading the system to shut down for safety. The most common reasons include a lack of gas supply to the unit, a blocked flue, or components inside the burner being too dirty or worn out to create a spark.
This fault is more common during extreme cold snaps, as the external condensate pipe can freeze and back up, preventing the boiler from successfully 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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