BoilerFaultCodes 50-59 High
Boiler Fault Code 50-59
Also written as 5059 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 50-59 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 unit has identified a critical internal malfunction, meaning it cannot safely operate and has shut down to protect itself. (As reported on Vokera Linea HE)
Pick your boiler brand for the 50-59 fix
Source
Information for the 50-59 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