BoilerFaultCodesTechnical description
Ignition fault. Boiler has attempted to light 5 times and failed
What causes this fault?
This fault occurs when the boiler is unable to detect a steady flame after several attempts to ignite the gas. The most common reasons are a lack of gas supply reaching the unit, worn-out ignition components that can't create a spark, or a dirty internal sensor that cannot tell the boiler the flame is lit.
This fault is frequently seen during extreme cold snaps, as the external condensate pipe can freeze and back up into the boiler, preventing 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.
Find a Gas Safe engineer
Search the official register →