BoilerFaultCodesYour boiler has failed to light the flame twice in a row, which means the system has stopped working for your 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 tries to light the flame twice but fails to detect a steady heat source. It is usually caused by a physical blockage in the burner area, a faulty ignition lead that cannot create a spark, or an incorrect mixture of gas and air preventing combustion.
This fault is slightly more common in winter because cold dampness can affect external gas regulators or cause condensation buildup inside the ignition components.
DIY fix possible
Check if your gas meter has credit and the gas supply valve is openCheck if other gas appliances in your home are workingPress the Reset button (indicated by a flame with a line through it) for five 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 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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