How much does it cost to fix boiler error code Low water pressure?

Typical repair cost for the boiler Low water pressure fault is £0-120 including labour.

Low water pressure High

Boiler Fault Code Low water pressure

Also written as LOWWATERPRESSURE — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Low water pressure appears across 4 boiler brands and 12 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 level inside the system is too low to operate safely, which is usually caused by a small leak or air being bled from radiators. (As reported on Ideal Compact)

Pick your boiler brand for the Low water pressure fix

Heatline Low water pressure 2 models Ideal Low water pressure 7 models Johnson Starley Low water pressure 1 model Potterton Low water pressure 2 models

Source

Information for the Low water pressure 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