BoilerFaultCodesBiasi LP Fault Code
The Biasi LP fault code means: your boiler is currently running in a special test mode used by engineers to check performance and is not experiencing an actual hardware fault.. It appears on 2 Biasi models in our database.
Technical description: minimum D.H.W. (Chimney sweep function)
DIY fix possible
Locate the selector or reset dial on the front panel.Turn the dial away from the chimney sweep or 'test' position back to your desired heating or hot water setting.Wait a few seconds for the 'LP' code to disappear and the screen to return to normal temperature display.
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Biasi models that show the LP fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Biasi LP 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 31 August 2026