BoilerFaultCodes.com
Indicator 2 (Burner Lit) Fast Flashing (8Hz) High Lockout

Your boiler has tried to ignite several times but failed to start, so it has locked itself out for safety.

Call an engineer soon

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.

Typical repair cost £120-350 (including labour)

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

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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.

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