BoilerFaultCodesWhat the manual says
Manufacturer manualIgnition failure (the spark/sensing electrode does not sense ignition after 5 attempts then go to lockout)
What causes this fault?
This fault occurs when the boiler attempts to start but cannot safely confirm a flame is present. The most common reasons are that the gas supply isn't reaching the burner, the ignition electrodes are worn out, or the internal drainage pipe is backed up with water, which triggers a safety sensor to prevent an overflow.
This fault is significantly more common during freezing winter temperatures, as the external condensate pipe can freeze, causing a blockage that prevents the boiler from firing.
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 AL10: no call-out fees, no surprise bills.
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