BoilerFaultCodesYour boiler has failed to light or maintain a flame, meaning your heating and hot water will not work until it is reset or repaired.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Flame Failure
What causes this fault?
This fault occurs when the boiler attempts to start, but the internal sensors cannot detect a steady flame. It is usually caused by a lack of gas reaching the burner, a buildup of carbon on the ignition spark, or a faulty sensor that cannot 'see' the fire even if it is lit. Without verification of a safe flame, the boiler shuts down as a safety precaution.
While this can happen year-round, it is more frequent during the first cold snap of winter when components that have been idle all summer are suddenly forced to work at maximum capacity.
DIY fix possible
Check if your gas supply is active by testing another gas appliance like a hob.Ensure your credit meter has sufficient balance if you have a prepay system.Turn the control knob to the 'Reset' position for five seconds, then turn it back to 'On'.
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 20 — no call-out fees, no surprises.
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Potterton Performa System E 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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