BoilerFaultCodes L.194 High
Boiler Fault Code L.194
Also written as L194 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code L.194 appears across 1 boiler brand and 3 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 system is experiencing an electrical fault, meaning the internal computer cannot receive the power it needs to operate the heating and hot water. (As reported on Vaillant ecoTEC Plus 832)
Pick your boiler brand for the L.194 fix
Source
Information for the L.194 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 7 July 2026