BoilerFaultCodesYour boiler has stopped working because it cannot light the gas required to provide heat or hot water.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: The burner fails to ignite
What causes this fault?
This fault occurs when the boiler's control system attempts to light the burner but fails to detect a flame after several attempts. The most common reasons include a lack of gas reaching the unit, a worn-out ignition spark electrode, or a blockage within the burner system preventing the gas from catching light.
This fault is more common during extreme cold snaps, as external gas meters or pipes can sometimes freeze or experience pressure drops that prevent a consistent gas flow.
DIY fix possible
Check if your gas meter has credit and the isolation valve is openPress the reset button (the flame symbol with a cross) for five secondsWait for the boiler to restart and see if the fault clears
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 F1 — no call-out fees, no surprises.
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Glow-worm Flexicom cx 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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