Your boiler has tried to ignite several times but failed to start, so it has locked itself out for safety.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Ignition Lockout
What causes this fault?
This fault occurs when the boiler's control system attempts to light the burner but cannot detect a stable flame after several attempts. It is usually caused by a lack of fuel reaching the burner, a worn-out ignition spark, or a sensor that is failing to recognize that the flame is actually lit. As a safety precaution, the boiler shuts down completely to prevent unburnt gas from building up inside the unit.
DIY fix possible
Check that your gas prepayment meter has creditEnsure other gas appliances in the home are workingPress and hold the reset button (usually located on the front panel) for 5 seconds
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 Indicator 2 (Burner Lit) Fast Flashing (8Hz) — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.
Glow-worm Hideaway 40B 50B 60B FF 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.