bP Low

Biasi bP Fault Code

Also written as BP — same fault.

The Biasi bP fault code means: your boiler has detected very low temperatures and is automatically warming itself up to prevent the internal pipes from freezing.. 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: Boiler in antifreeze phase (flashing bP + flashing temperature).
Typical repair cost £0 (including labour)

DIY fix possible

Wait for the boiler to finish its warming cycle; the code will disappear once it reaches a safe temperature.Ensure your household heating is turned on or the thermostat is turned up to keep the system warm.Check that any visible external condensate pipes are not frozen or blocked with ice.

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Biasi models that show the bP fault code

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

Source

Biasi bP 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