BoilerFaultCodesYour boiler has failed to light the flame twice in a row, which means the system has stopped providing heating and hot water 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: Unsuccessful ignition for the second time
What causes this fault?
This fault occurs when the boiler's control system fails to detect a flame after two consecutive attempts to start. The issue is usually caused by a lack of fuel reaching the burner, a faulty spark that cannot ignite the gas, or a sensor that is unable to confirm the flame is present.
This fault is more frequent during very cold spells when external gas regulators or pipes can experience pressure drops or ice-related blockages.
DIY fix possible
Check if other gas appliances, like a hob, are working to ensure gas is reaching the propertyCheck that your gas pre-payment meter (if applicable) has enough creditPress the Reset button (the flame icon with a cross) for one second 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 D.69 — no call-out fees, no surprises.
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Could it be time for a new boiler?
If repair costs are adding up, a new energy-efficient boiler could be the smarter long-term choice.
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