19 High

Boiler Fault Code 19

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code 19 appears across 10 boiler brands and 25 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 1 model Atag 19 1 model Biasi 19 4 models Ferroli 19 3 models Glow-worm 19 4 models Ideal 19 2 models Potterton 19 1 model Remeha 19 3 models Saunier Duval 19 4 models Worcester Bosch 19 2 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 27 April 2026