BoilerFaultCodesYour boiler has tried to light several times but has been unable to produce a flame, meaning your heating and hot water will not work.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: No flame after 5 ignition attempts
What causes this fault?
This fault occurs when the boiler's internal computer tries to light the gas five times but cannot detect a sustained flame. The most common reasons include a lack of gas reaching the unit, a blocked drainage pipe, or dirty internal components that can no longer create a spark.
This fault is particularly common during freezing winter temperatures, as the external condensate pipe can freeze and back up, preventing the boiler from lighting.
DIY fix possible
Check if your gas supply is turned on at the meterIf you have a prepay meter, check that you have enough creditTry resetting the boiler by pressing the reset button for a few secondsCheck if other gas appliances in your home, like a hob, are working correctly
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 133 — 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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