BoilerFaultCodesTechnical description
Error during start-up or operation; followed by a 3 minute venting cycle
What causes this fault?
This fault occurs when the boiler's control system fails to detect a stable flame after several attempts to light the burner. The most common reasons are worn-out ignition parts that can no longer create a spark or a faulty sensor that cannot tell the boiler the gas has successfully lit.
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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