BoilerFaultCodesYour boiler is failing to light the gas 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: Ignition error
What causes this fault?
This fault occurs when the boiler is unable to establishes a flame after several attempts, typically because the fuel isn't reaching the burner or the spark isn't igniting it. The most common reasons include a lack of gas supply, a blocked condensate pipe, or worn-out internal components like the ignition electrodes.
This fault is much more 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 meter has credit (if prepay) or if other gas appliances like your hob are working.Press and hold the 'Reset' button for five seconds to see if the boiler restarts.If it is freezing outside, check if the white plastic condensate pipe leading outdoors is frozen and thaw it with warm water.
Find a Gas Safe engineer
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Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like E133 — no call-out fees, no surprises.
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Baxi Duo-tec/Megaflo 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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