BoilerFaultCodesIdeal Water Pressure Fault Code
Also written as WATERPRESSURE — same fault.
The Ideal Water Pressure fault code means: your boiler has stopped heating your home or water because the amount of water inside the system has dropped below the required level.. It appears on 7 Ideal models in our database.
Technical description: Low Water Pressure
DIY fix possible
Locate the external filling loop, which is a flexible braided hose underneath the boiler.Open the two valves on either end of the hose one by one to let water into the system.Watch the pressure gauge on the front of the boiler until the needle reaches the green zone (typically 1.0 to 1.5 bar).Close both valves tightly and remove the filling loop if required by your specific model.
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Ideal models that show the Water Pressure fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ideal Water Pressure fault code information on this page is sourced and cross-checked against the official Ideal service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 31 August 2026