BoilerFaultCodes PP/LL Low
Boiler Fault Code PP/LL
Also written as PPLL — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code PP/LL 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 currently just notifying you that it is adjusting its internal ignition power level; this is a normal operational message rather than a breakdown. (As reported on Ariston Genus 24 MFFI)
Pick your boiler brand for the PP/LL fix
Source
Information for the PP/LL 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