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

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

cP Low

Boiler Fault Code cP

Also written as CP — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code cP 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 at its highest power setting for a professional combustion test and should return to normal operation automatically after a short period. (As reported on Biasi Inovia 2020)

Pick your boiler brand for the cP fix

Biasi cP 2 models

Source

Information for the cP 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