BoilerFaultCodes P5 High
Boiler Fault Code P5
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code P5 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 has detected that water is struggle to circulate through your heating system quickly enough, often due to a blockage or a pump issue. (As reported on Ideal HP290)
Pick your boiler brand for the P5 fix
Source
Information for the P5 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