BoilerFaultCodes 50 High
Boiler Fault Code 50
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 50 appears across 21 boiler brands and 62 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has stopped providing hot water because the internal sensor that measures water temperature has detected a technical fault or a short circuit. (As reported on Viessmann Vitodens 200-W)
Pick your boiler brand for the 50 fix
Atag 50 8 models Baxi 50 3 models Biasi 50 4 models British Gas 50 1 model Chaffoteaux 50 1 model Daikin 50 1 model Dimplex 50 2 models ECA 50 1 model Ferroli 50 6 models Gledhill 50 1 model Halstead 50 5 models Heatline 50 3 models Ideal 50 3 models Malvern 50 1 model Navien 50 1 model Potterton 50 3 models Servowarm 50 1 model Viessmann 50 12 models Vokera 50 3 models Warmworld 50 1 model Worcester Bosch 50 1 model
Source
Information for the 50 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