0A44 High
Boiler Fault Code 0A44
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 0A44 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 is struggling to accurately measure the temperature of the water returning to it, which causes it to stop operating to stay on the safe side. (As reported on Alpha Pro Tec Plus)
Pick your boiler brand for the 0A44 fix
Source
Information for the 0A44 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