Low
1 second ON 1 second OFF on Biasi Riva Advance M96.24SM

Your boiler is operating normally and is currently running because there is a demand for heating or hot water.

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

Boiler ON condition

From this model's manual
Verified against the Biasi Riva Advance M96 24sm 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 is required as this light sequence indicates normal operation.Check your thermostat or hot water tap to confirm you intended for the boiler to be running.

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Avoid the next call-out bill

A cover plan would handle faults like 1 second ON 1 second OFF: no call-out fees, no surprise bills.

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