BoilerFaultCodesWhat the manual says
Manufacturer manualSequence Error / Software Error / Ignition Lockout
What causes this fault?
This fault occurs when the boiler attempts to start up but fails to detect a flame after several attempts. The most common reasons are a worn-out ignition spark that can no longer light the gas or a faulty gas valve that isn't letting fuel into the burner.
This issue is more frequent during the first cold snap of winter when components that have been idle over summer are suddenly put under heavy strain.
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.
Avoid the next call-out bill
A cover plan would handle faults like Slow Flashing (2Hz): no call-out fees, no surprise bills.
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