Li01 High

Biasi Li01 Fault Code

Also written as LI01 — same fault.

The Biasi Li01 fault code means: your boiler has shut down because the internal water temperature has become too hot while trying to provide hot water.. It appears on 1 Biasi model in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: Primary circuit temperature limit during d.h.w. operation
Typical repair cost £100-280 (including labour)

DIY fix possible

Check that the radiator valves and the main boiler valves are fully openEnsure the central heating system pressure is between 1.0 and 1.5 barReset the boiler using the control knob to see if the fault clears

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Biasi models that show the Li01 fault code

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

Source

Biasi Li01 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