BoilerFaultCodesYour boiler is failing to ignite a flame which means you currently have no heating 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 boiler fails to light after 10 seconds
What causes this fault?
This fault occurs when the boiler attempts to start but cannot establish a stable flame to begin heating your water. It is usually caused by a lack of gas reaching the burner, a worn-out component failing to create a spark, or the internal sensors not detecting the flame once it has lit.
This issue is frequently seen during the first cold snap of autumn when internal components seized over the summer are finally put under pressure to perform.
DIY fix possible
Check if other gas appliances (like a hob) are working to ensure your gas supply is turned onCheck if you have credit on your gas meterPress the Reset button once to see if the boiler restarts
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 Fault led (B) illuminated (after 10 seconds) — no call-out fees, no surprises.
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Ideal Boxer C 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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