BoilerFaultCodes AP073 Low
Boiler Fault Code AP073
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code AP073 appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler is noting the outdoor temperature to decide whether to turn your heating on, which is a normal status update rather than a system fault. (As reported on Baxi 400 Combi 2)
Pick your boiler brand for the AP073 fix
Source
Information for the AP073 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