BoilerFaultCodes L E High
Boiler Fault Code L E
Also written as LE — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code L E appears across 1 boiler brand and 7 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler's main control unit has identified a critical internal electronic failure and requires a professional inspection to determine if the computer board needs to be replaced. (As reported on Ideal Icos HE)
Pick your boiler brand for the L E fix
Source
Information for the L E 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