BoilerFaultCodesTechnical description
Lockout after ignition failure or sensing/spark electrode fault
What causes this fault?
This fault occurs when the boiler tries to start up but cannot successfully establish or detect a flame. The most common reasons are a lack of gas reaching the burner, a dirty electrode that can no longer create a spark, or a sensor that fails to tell the boiler the fire has actually lit.
This issue can occur more frequently during the first cold snap of autumn when internal components that have been idle all summer suddenly struggle to operate or become stuck.
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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