BoilerFaultCodes P6 Low
Boiler Fault Code P6
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code P6 appears across 1 boiler brand and 2 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler is simply performing a routine internal check as it starts up and the code should disappear after a few seconds. (As reported on Worcester Bosch Greenstar 25HE)
Pick your boiler brand for the P6 fix
Source
Information for the P6 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