BoilerFaultCodes Li High
Boiler Fault Code Li
Also written as LI — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Li appears across 1 boiler brand and 10 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has failed to ignite because the burner did not light after several attempts, meaning your heating and hot water will not work. (As reported on Biasi M96E)
Pick your boiler brand for the Li fix
Source
Information for the Li 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