BoilerFaultCodes AA2211 High
Boiler Fault Code AA2211
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code AA2211 appears across 1 boiler brand and 2 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler is failing to detect that water is moving through the system, so it is refusing to ignite to protect itself. (As reported on Ariston Micro Condens)
Pick your boiler brand for the AA2211 fix
Source
Information for the AA2211 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