BoilerFaultCodesYour boiler has failed to light or maintain a flame, which means it has locked itself out to prevent fuel from building up.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Gas supply problem, Gas line requires purging, Reversed polarity, Broken internal flue joint, or the burner has failed to ignite, or the flame supervision system has failed to detect a flame.
What causes this fault?
This fault occurs when the boiler tries to light but cannot establish a stable flame to provide heat or hot water. The most common reasons include a lack of gas reaching the burner, a buildup of carbon on the ignition probe, or a faulty component that is unable to detect that the fire has actually started. To stay safe, the boiler stops working immediately to ensure gas does not enter your home without being burned.
This fault is slightly more common in winter as cold weather can cause external gas meters or pipes to experience pressure drops, or internal components may fail under the heavy workload of heating a cold home.
DIY fix possible
Check if other gas appliances (like a cooker) are working to confirm gas is reaching the propertyTurn the selector switch to the 'R' (Reset) position for a few seconds and then back to the 'ON' positionEnsure your gas meter has credit if you are on a pre-payment meter
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 01 — no call-out fees, no surprises.
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Vokera Linea 7 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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