BoilerFaultCodes 0A16 High
Boiler Fault Code 0A16
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 0A16 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 heat the water quickly enough, so it has stopped working to prevent itself from overheating. (As reported on Alpha Pro Tec Plus)
Pick your boiler brand for the 0A16 fix
Source
Information for the 0A16 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