BoilerFaultCodesTechnical description
Failure of flame after 5 attempts to ignite
What causes this fault?
This fault occurs when the boiler tries to light the gas burner five times but fails to detect a stable flame. The most common reasons are a build-up of carbon on the ignition probes, a lack of gas supply to the unit, or a internal electrical component failing to generate the necessary spark.
This fault often appears during the first cold snap of autumn when a boiler that has been idle all summer is suddenly forced to work harder, highlighting wear and tear on the electrodes.
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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