BoilerFaultCodesYour boiler was working but the flame has unexpectedly gone out, meaning the system has stopped providing heat 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: Flame failure during operation
What causes this fault?
This fault occurs when your boiler successfully starts but then loses its flame while it is running. The most common reasons are a build-up of carbon on the sensing probe or a blockage in the drainage system that causes water to back up into the burner. In some cases, the gas valve may be failing to maintain a steady flow of fuel to keep the flame lit.
This fault is more common in freezing winter conditions, as a frozen external condensate pipe can cause water to back up and extinguish the flame.
DIY fix possible
Check if other gas appliances in your home, like a gas hob, are working to ensure gas supply is active.Verify that your prepaid gas meter (if applicable) has sufficient credit.Press the 'Reset' button on the boiler control panel for two 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 E05 — no call-out fees, no surprises.
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Remeha Avanta Plus 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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