BoilerFaultCodesWhat the manual says
Manufacturer manualFlame Loss
What causes this fault?
This fault occurs when the boiler successfully starts but then unexpectedly loses its flame while it is trying to provide heat or hot water. The most common reasons are a dirty or worn-out sensor that can no longer 'see' the flame, or an inconsistent gas supply that causes the burner to go out. It can also be caused by debris blocking the burner or a failing component that manages the electrical spark.
This fault can be more common during very cold snaps if the gas meter regulator freezes or if the increased demand for gas in the neighborhood causes a drop in pressure.
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 Ln: no call-out fees, no surprise bills.
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