BoilerFaultCodesYour boiler is struggling to keep its flame lit, which means it cannot heat your water or radiators.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Flame Loss
What causes this fault?
This fault occurs when the boiler's internal computer can no longer detect the flame required to heat the water, causing the system to shut down for safety. The most common reasons are a build-up of carbon on the sensing probes, a blockage in the flue, or an inconsistent supply of gas reaching the burner.
This code can appear during extreme cold snaps if the external condensate pipe freezes, causing water to back up into the boiler and extinguish the flame.
DIY fix possible
Check if other gas appliances in your home, like a hob, are working to confirm gas supply.If your gas is on a pre-pay meter, ensure you have sufficient credit.Reset the boiler by turning the mode knob to 'RE' and back to the 'On' position.
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 Ln — no call-out fees, no surprises.
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Ideal Logic Combi ESP1 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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