BoilerFaultCodes P0 High
Boiler Fault Code P0
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code P0 appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has detected that the water pressure is too low for it to operate safely, which usually means the system needs more water. (As reported on Ideal HP290)
Pick your boiler brand for the P0 fix
Source
Information for the P0 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