BoilerFaultCodesYour boiler has failed to light the gas flame after several attempts, which means you will not have any heating or hot water until it is fixed.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: NO IGNITION (MAX. IGNITION TIME = 7 SECONDS): CHECK THE ELECTRODE AND ITS CORRECT CONNECTION. CHECK IGNITION. CHECK THERE IS MORE THAN 40V BETWEEN LIVE AND EARTH. CHECK THE GAS TAP ON THE INSTALLATION IS OPEN, THE GAS CONTROL VALVE, AND THE IGNITER.
What causes this fault?
This fault occurs when the boiler tries to light the gas to start the heating process but fails to detect a flame within seven seconds. The most common reasons are a lack of gas supply reaching the unit, a worn-out component that creates the spark, or a fault within the internal valve that controls the flow of fuel.
This issue can occur more frequently during extreme cold snaps if the external gas regulator or pipework becomes affected by freezing temperatures, restricting gas flow.
DIY fix possible
Check that your gas emergency control valve is in the open positionEnsure any other gas appliances in the home are working to confirm gas supplyIf you have a prepayment meter, check that it has sufficient creditPress the reset button (indicated by a flame with a cross through it) once
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 04 — no call-out fees, no surprises.
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Glow-worm Xtramax 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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