P13 High

Boiler Fault Code P13

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code P13 appears across 3 boiler brands and 4 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler's computer is struggling to recognise the power settings configured during installation, which prevents it from firing up safely. (As reported on Alpha Pro Tec Plus)

Pick your boiler brand for the P13 fix

Alpha P13 2 models Ferroli P13 1 model Vaillant P13 1 model

Source

Information for the P13 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