BoilerFaultCodesYour boiler is currently trying to light the flame, and the light should turn off as soon as the heater starts working normally.
This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.
Technical description: Flashes to indicate ignition operation (stops after detection.)
What causes this fault?
This status occurs when the boiler sends an electrical spark to the burner to start the heating process. It is a normal part of operation, but if the light continues to flash without the boiler firing up, it usually means the gas isn't catching or the system can't 'see' the flame. This is often caused by a worn-out ignition component or a probe that has become dirty over time.
DIY fix possible
Check that your gas supply is turned onObserve if the light stops flashing once the boiler fires upIf the light continues to flash but the boiler does not light, try resetting the power
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 Neon SG1 — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.
Ideal Mexico Slimline CF440 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.
Affiliate links — we may earn a commission at no extra cost to you.