BoilerFaultCodesYour boiler has tried to light the burner but cannot maintain a flame, meaning the system has safely shut down to prevent unburnt gas from escaping.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Illuminates if the burner is extinguished while there is still a demand for the boiler to operate. Indicates a fault if it illuminates repeatedly.
What causes this fault?
This fault occurs when the boiler's safety system cannot detect a steady flame after trying to ignite. The most common reasons are a worn-out ignition spark that fails to light the gas, a dirty sensor that can't see the flame, or a faulty gas valve that isn't delivering fuel correctly.
This issue often surfaces during the first cold snap of autumn when a buildup of dust or debris on the burner from lack of use prevents a smooth ignition.
DIY fix possible
Check if your gas supply is active by testing another gas appliance like a hobPress the reset button on the control panel to see if the boiler restartsEnsure the external flue terminal is not blocked by debris or plants
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like Flame Failure Neon — no call-out fees, no surprises.
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Potterton Osprey 2 CFL 125 is discontinued — time for a new one?
Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.
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