Low
PO on Biasi Rinnova Adaptive Combi

Your boiler is simply finishing a standard cooling cycle and is not currently experiencing a breakdown.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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

Pump active for the post-circulation phase (flashing PO + flashing temperature).

From this model's manual
Verified against the Biasi Rinnova Adaptive Combi System 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

Wait for the boiler to finish circulating water (usually 1-5 minutes).Monitor the display until the PO code disappears and the temperature returns to normal.No further action is required as this is normal operation.

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