BoilerFaultCodesYour boiler is having trouble lighting the gas to start the heating process and may need to be restarted.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Ignition error – possible fault with valve on the gas line due to it being open. Try resetting the boiler after the third unsuccessful ignition
What causes this fault?
This fault occurs when the boiler's control system detects that the gas valve is open but it cannot successfully establish or sense a flame. The most common reasons are a physical failure of the gas valve mechanism, worn-out ignition electrodes that can no longer produce a strong spark, or a degraded spark cable that is leaking electricity before it reaches the burner.
DIY fix possible
Check that your gas emergency control valve is in the 'on' positionCheck if other gas appliances in your home are workingPress the 'Reset' button on the boiler control panel up to three times
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 11-64 — 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.