BoilerFaultCodes 19 High
Boiler Fault Code 19
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 19 appears across 17 boiler brands and 53 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 working because a sensor that monitors the temperature of the water in your heating system has become loose or disconnected from its pipe. (As reported on Glow-worm Ci Plus)
Pick your boiler brand for the 19 fix
Alpha 19 3 models Atag 19 6 models Baxi 19 3 models Biasi 19 4 models Ferroli 19 4 models Gledhill 19 1 model Glow-worm 19 7 models Heatline 19 3 models Ideal 19 5 models Potterton 19 1 model Remeha 19 3 models Saunier Duval 19 4 models Sime 19 1 model Unical 19 2 models Viessmann 19 2 models Vokera 19 1 model Worcester Bosch 19 3 models
Source
Information for the 19 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