BoilerFaultCodesYour boiler is failing to light the fuel or keep the burner running, meaning it is not producing any 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: Flame Failure
What causes this fault?
This fault occurs when the boiler attempts to light the burner but cannot detect a stable flame. The most common reasons include a worn-out sensor that can no longer 'see' the fire, a blockage in the gas supply, or an electronic failure that prevents the initial spark from occurring.
DIY fix possible
Check if your gas supply is active by testing another gas appliance like a hobEnsure your credit meter has sufficient fundsPress the reset button on the front of the boiler for a few seconds
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 23 — no call-out fees, no surprises.
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Potterton Performa 28i 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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