Your boiler has tried to start but failed to light the flame, leaving you without 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: Failure to ignite
What causes this fault?
This fault occurs when the boiler's control system fails to detect a steady flame after several attempts to start. It is usually caused by a worn ignition spark that cannot light the gas, or a dirty sensor that fails to tell the boiler the flame is actually lit. In some cases, the gas valve may be stuck or electrical components have failed, preventing the combustion process from beginning.
This fault can appear more frequently during the first cold snap of autumn when internal components that have been idle all summer struggle to move or ignite correctly.
DIY fix possible
Check if other gas appliances in your home, such as a hob, are working correctly.Ensure your gas meter has credit and the isolation valve is open.Press and hold the 'Reset' button for two seconds to see if the boiler restarts.
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 E01 — no call-out fees, no surprises.
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Remeha Quinta 115 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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