BoilerFaultCodesWhat the manual says
Manufacturer manualCheck gas supply, check flue system, check polarity
What causes this fault?
This fault occurs when the boiler attempts to start up but fails to sense a flame after several attempts. The most common reasons are a lack of gas reaching the burner, a faulty spark electrode that can't ignite the fuel, or a blockage in the chimney pipe preventing the air flow needed for combustion.
This issue can occur more frequently during a cold snap if the external gas regulator or pipework becomes affected by freezing temperatures, restricting gas flow.
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 10: no call-out fees, no surprise bills.
Affiliate links. We may earn a commission at no extra cost to you.