BoilerFaultCodesYour boiler has failed to ignite, which means it cannot provide heat or hot water because it isn't successfully lighting a flame.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Check gas supply, check flue system, check polarity
What causes this fault?
This fault occurs when the boiler's control system attempts to start a flame but fails to detect one after several attempts. The most common reasons include a lack of gas reaching the unit, a worn-out ignition spark, or a blockage in the pipes that carry exhaust fumes away from your home.
This issue is more frequent during extremely cold spells, as external gas meters or regulator components can sometimes struggle with freezing temperatures or high demand.
DIY fix possible
Check if other gas appliances, like a cooker hob, are working to confirm gas supply.Check that your gas meter has credit if you have a pre-payment meter.Reset the boiler by turning the mode selector switch to the 'Reset' position for a few seconds and then back to 'On'.
Find a Gas Safe engineer
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A boiler cover plan would cover faults like 10 — no call-out fees, no surprises.
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Vokera Unica HE 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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