Po Low

Biasi Po Fault Code

Also written as PO — same fault.

The Biasi Po fault code means: your boiler is simply running its pump for a short time after heating to distribute residual warmth, which is a normal part of the cooling-down process.. It appears on 2 Biasi models 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 activated for the post-circulation phase

Engineer required

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

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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 7 July 2026