BoilerFaultCodesTechnical description
Boiler indicates start-up sequence (Start sequence not completed if it restarts at P1)
What causes this fault?
This fault occurs when the boiler begins its ignition sequence but fails to establish or maintain a stable flame within the required time. The most common reasons are worn-out spark electrodes that can no longer create a spark or a faulty gas valve that isn't delivering enough fuel for the fire to light. Because the system cannot confirm the presence of a safe flame, it constantly resets to protect itself.
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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