How much does it cost to fix boiler error code P 3.1 or higher?

Typical repair cost for the boiler P 3.1 or higher fault is £120-250 including labour.

P 3.1 or higher High

Boiler Fault Code P 3.1 or higher

Also written as P31ORHIGHER — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code P 3.1 or higher appears across 1 boiler brand and 1 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 water pressure inside the system is dangerously high while it is running, which can put unnecessary stress on your pipework and internal components. (As reported on Potterton Powermax HE)

Pick your boiler brand for the P 3.1 or higher fix

Potterton P 3.1 or higher 1 model

Source

Information for the P 3.1 or higher 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