Low
Normally operating boiler on Biasi Riva Compact HE M96a

Your boiler is operating normally and is currently in standby mode, waiting for a signal to provide 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

1 second ON 1 second OFF (function control in Winter or Summer position)

From this model's manual
Verified against the Biasi Riva Compact 24s 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.

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Avoid the next call-out bill

A cover plan would handle faults like Normally operating boiler: no call-out fees, no surprise bills.

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