BoilerFaultCodes PP/-- Low
Boiler Fault Code PP/--
Also written as PP — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code PP/-- 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 displaying a technical configuration menu item rather than a fault, meaning it is showing you its current internal heating power setting. (As reported on Ariston Genus 24 MFFI)
Pick your boiler brand for the PP/-- fix
Source
Information for the PP/-- 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