BoilerFaultCodesTechnical description
The appliance fails to ignite during the ignition sequence.
What causes this fault?
This fault occurs when the boiler attempts to start up but cannot successfully establish a flame to heat the water. The most common reasons include a lack of gas supply to the unit, a worn-out spark electrode that can no longer create a light, or a faulty gas valve that isn't opening correctly.
This issue can be more frequent during extreme cold spells if the external gas regulator freezes or if there is a blockage in the flue due to heavy snow or ice.
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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