BoilerFaultCodes Li01 High
Boiler Fault Code Li01
Also written as LI01 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Li01 appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has shut down because the internal water temperature has become too hot while trying to provide hot water. (As reported on Biasi Activa)
Pick your boiler brand for the Li01 fix
Source
Information for the Li01 fault code is sourced from the official service / installation manual for each model that displays it. Read more about how we source fault codes →
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026