BoilerFaultCodesYour boiler has tried to light several times but cannot establish a flame, meaning you will 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: More than 5 start attempts without any flame formation.
What causes this fault?
This fault occurs when the boiler is unable to detect a stable flame after several attempts to ignite the gas. The most common reasons include a blocked gas supply, worn-out spark electrodes failing to create a spark, or a dirty sensor that cannot tell the boiler the flame is actually lit.
This fault is more common in winter, as extremely cold temperatures can cause external gas regulators or condensate pipes to freeze, preventing the boiler from firing safely.
DIY fix possible
Check if your gas credit has run out or if other gas appliances in your home are workingEnsure the gas supply valve is fully openPress the 'Reset' button for two seconds to attempt a restartCheck for external pipe blockages, such as a frozen condensate pipe in winter
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 e4 — 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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