BoilerFaultCodes H5 High
Boiler Fault Code H5
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code H5 appears across 2 boiler brands and 2 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your heat pump is detecting an electrical overload in its power management system and has prevented itself from running to avoid damage. (As reported on Ideal HP290)
Pick your boiler brand for the H5 fix
Source
Information for the H5 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