PO Low

Biasi PO Fault Code

The Biasi PO fault code means: your boiler is simply finishing a standard cooling cycle and is not currently experiencing a breakdown.. It appears on 1 Biasi model in our database.

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.

Technical description: Pump active for the post-circulation phase (flashing PO + flashing temperature).
Typical repair cost £0 (including labour)

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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Biasi models that show the PO fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Biasi PO fault code information on this page is sourced and cross-checked against the official Biasi service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026