Low
Neon SG1 on Ideal Classic NF

Your boiler is currently trying to light the flame and is showing you its progress, which is a normal part of its starting process.

Monitor it

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.

What the manual says

Manufacturer manual

Flashes to indicate spark operation (stops after detection).

From this model's manual
Verified against the Ideal Classic Nf installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

DIY fix possible

No action required; this is a normal operational light.Monitor the boiler to ensure the light stops flashing once the flame is established.If the light continues to flash without the boiler firing up, try resetting the boiler.

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