How much does it cost to fix boiler error code WATER PRESSURE TOO HIGH?

Typical repair cost for the boiler WATER PRESSURE TOO HIGH fault is £90-180 including labour.

WATER PRESSURE TOO HIGH Medium

Boiler Fault Code WATER PRESSURE TOO HIGH

Also written as WATERPRESSURETOOHIGH — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code WATER PRESSURE TOO HIGH 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 too much water in the system, which can put unnecessary stress on the internal seals and pipework. (As reported on Johnson Starley J32 System ET)

Pick your boiler brand for the WATER PRESSURE TOO HIGH fix

Johnson Starley WATER PRESSURE TOO HIGH 1 model

Source

Information for the WATER PRESSURE TOO HIGH 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