BoilerFaultCodes PP/AA Low
Boiler Fault Code PP/AA
Also written as PPAA — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code PP/AA 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 intentionally waiting before it tries to ignite the heating system, which is a normal protective feature to prevent it from cycling on and off too frequently. (As reported on Ariston Genus 24 MFFI)
Pick your boiler brand for the PP/AA fix
Source
Information for the PP/AA 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