BoilerFaultCodesYour boiler has lost its gas supply or the flame has gone out and it cannot restart itself.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Flame extinguished re–ignition unsuccessful | Cause: Gas supply absent or insufficient, Check flue duct
What causes this fault?
This fault occurs when the boiler is running but suddenly loses its flame and cannot successfully relight itself. The most common reasons are a temporary interruption in the gas supply, a blocked flue preventing proper airflow, or a build-up of carbon on the sensor that detects the flame.
This fault is more frequent during extreme cold spells, as external gas meters or regulators can freeze and restrict the flow of gas to the property.
DIY fix possible
Check if other gas appliances in your home, like a hob, are working correctly.If you have a prepayment meter, ensure you have sufficient credit topped up.Check if the gas emergency control valve near your meter has been accidentally turned off.Press the 'Reset' button (flame symbol with a cross) for one second 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 F.29 — no call-out fees, no surprises.
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Vaillant Ecomax 613 2 E 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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