How much does it cost to fix boiler error code H n?

Typical repair cost for the boiler H n fault is £90-250 including labour.

H n Medium

Boiler Fault Code H n

Also written as HN — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code H n 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 is displaying a service notification or a specific lockout state that requires a professional to check the internal sequence and settings. (As reported on Evo HE 12)

Pick your boiler brand for the H n fix

Evo H n 1 model Ideal H n 2 models

Source

Information for the 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 7 July 2026