How much does it cost to fix boiler error code Pressure below 0.5?

Typical repair cost for the boiler Pressure below 0.5 fault is £60-120 including labour.

Pressure below 0.5 High

Boiler Fault Code Pressure below 0.5

Also written as PRESSUREBELOW05 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Pressure below 0.5 appears across 2 boiler brands 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 has stopped working because the water pressure in the system has dropped too low to operate safely. (As reported on Potterton Performa 24)

Pick your boiler brand for the Pressure below 0.5 fix

Baxi Pressure below 0.5 1 model Potterton Pressure below 0.5 1 model

Source

Information for the Pressure below 0.5 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