BoilerFaultCodesYour boiler has attempted to light but has failed to detect a flame, causing it to shut down for safety.
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's internal sensors cannot confirm that a flame has successfully ignited after several attempts. The most common reasons are worn-out ignition sparks that fail to light the gas, or a dirty sensor that cannot 'see' the flame even if it is actually burning. It can also be caused by an interruption in the gas supply or a fault within the main control board.
This fault is slightly more common during the first cold snap of autumn, as internal components can stick or become unreliable after sitting idle throughout the summer months.
DIY fix possible
Check if other gas appliances in your home, such as a hob, are working to confirm gas supply.Verify that your gas meter has credit if you use a top-up or pre-payment system.Press and hold the reset button for five seconds to see if the boiler restarts.
Find a Gas Safe engineer
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Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like 23 — no call-out fees, no surprises.
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Potterton Performa 24 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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