BoilerFaultCodesTechnical description
If, after 5 attempts the burner has failed to light, the boiler will go to lockout and L-01 will be displayed on the screen.
What causes this fault?
This fault occurs when the boiler cannot detect a flame after several attempts to start. The issue is typically caused by a lack of gas reaching the burner, a faulty ignition system failing to create a spark, or a dirty sensor that cannot confirm the fire is actually lit.
This fault is more frequent during the first cold snap of autumn when internal components or gas valves may stick after being dormant throughout the summer.
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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