P.02 Low

Boiler Fault Code P.02

Also written as P02 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code P.02 appears across 4 boiler brands and 29 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is performing a routine self-diagnostic purge or testing phase and is not currently experiencing a breakdown. (As reported on Vaillant ecoTEC pro)

Pick your boiler brand for the P.02 fix

Glow-worm P.02 15 models Heatline P.02 2 models Sime P.02 1 model Vaillant P.02 11 models

Source

Information for the P.02 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 31 August 2026