How much does it cost to fix boiler error code hP?

Typical repair cost for the boiler hP fault is £0 including labour.

hP Low

Boiler Fault Code hP

Also written as HP — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code hP appears across 1 boiler brand and 2 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is currently running a manual test mode to check its performance at the lowest power setting and is not experiencing a functional fault. (As reported on Biasi Rinnova Adaptive Combi)

Pick your boiler brand for the hP fix

Biasi hP 2 models

Source

Information for the hP 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