BoilerFaultCodesYour boiler has tried to light itself several times but cannot establish a flame, meaning you will have no heating or hot water until it is reset or repaired.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Ignition fault. Boiler has attempted to light 5 times and failed.
What causes this fault?
This fault occurs when the boiler cannot successfully create or detect a flame after several attempts. The most common reasons include a lack of gas reaching the unit, a worn-out ignition spark, or a sensor that can no longer confirm the flame is safely lit.
This fault is more common in winter, as frozen condensate pipes can back up and prevent the boiler from igniting properly.
DIY fix possible
Check if other gas appliances in your home, like a hob, are working to ensure gas is reaching the propertyCheck that your gas meter has credit if you use a pre-payment systemPress and hold the reset button for five seconds 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 3 red flashes — 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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