44 Medium

Boiler Fault Code 44

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code 44 appears across 12 boiler brands and 38 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has detected an electrical fault with a sensor that controls the temperature for a specific part of your heating system, which may prevent that area from warming up properly. (As reported on Viessmann Vitodens 242-F B2UA)

Pick your boiler brand for the 44 fix

Alpha 44 13 models Baxi 44 1 model Biasi 44 2 models Gledhill 44 1 model Grant 44 6 models Ideal 44 1 model Johnson Starley 44 5 models Remeha 44 3 models Saunier Duval 44 1 model Unical 44 2 models Viessmann 44 2 models Vokera 44 1 model

Source

Information for the 44 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