BoilerFaultCodesTechnical description
Possible gas supply issue (failure to light)
What causes this fault?
This fault occurs when the boiler has tried to ignite several times but failed to detect a flame. The most common cause is a blockage in the condensation pipe or a temporary interruption in your gas supply, though it can also be caused by worn internal components like the ignition electrodes.
This fault is significantly more common during freezing winter temperatures, as the external condensation drain pipe can freeze and prevent the boiler from operating.
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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