BoilerFaultCodesTechnical description
Ignition lockout
What causes this fault?
This fault occurs when the boiler's internal computer senses that a flame has not been successfully lit after several attempts. The most common reasons include a lack of gas reaching the burner, a dirty or worn spark plug that can't create a flame, or an issue with the gas valve not opening correctly.
This fault is more common during extreme cold spells, as the external condensate pipe can freeze and back up, preventing the boiler from completing the ignition process.
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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