BoilerFaultCodesYour boiler has stopped working because it failed to light the flame after several attempts, usually due to a lack of gas supply or an ignition problem.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Flame lockout
What causes this fault?
This fault occurs when the boiler attempts to start up but cannot successfully establish or detect a steady flame. The most common reasons are a temporary interruption in the gas supply, a build-up of carbon on the ignition parts, or a component failure that prevents the spark from firing.
This issue can occur in freezing temperatures if the external gas regulator or pipework becomes restricted by extreme cold, though it is often a year-round mechanical fault.
DIY fix possible
Check if other gas appliances in your home, like a hob, are working to confirm gas supply.Verify that your gas meter has credit if you use a pre-payment meter.Press the Reset button on the boiler control panel to see if the system 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 E10 — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.
Could it be time for a new boiler?
If repair costs are adding up, a new energy-efficient boiler could be the smarter long-term choice.
Affiliate links — we may earn a commission at no extra cost to you.