BoilerFaultCodesTechnical description
Re-set as described for code 01.
What causes this fault?
This fault happens because the boiler has tried to light the burner but failed to detect a steady flame after several attempts. It is usually caused by a lack of gas reaching the burner, a worn-out ignition spark, or a sensor that can no longer 'see' the flame even if it is there.
This issue is more frequent during extreme cold snaps, as external gas meters or pipes can sometimes become restricted by freezing temperatures.
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 →