P05 Low

Boiler Fault Code P05

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code P05 appears across 2 boiler brands 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 taking a moment to adjust its internal temperature settings before it restarts, which is a normal part of its safety process. (As reported on Alpha Pro Tec 24)

Pick your boiler brand for the P05 fix

Alpha P05 2 models Ferroli P05 1 model

Source

Information for the P05 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