BoilerFaultCodes 95 H......n..... High
Boiler Fault Code 95 H......n.....
Also written as 95HN — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 95 H......n..... appears across 1 boiler brand 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 the electrical wiring coming into the unit is connected backwards, which is preventing it from starting up for safety reasons. (As reported on Ideal Esprit HE)
Pick your boiler brand for the 95 H......n..... fix
Source
Information for the 95 H......n..... 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