BoilerFaultCodesAriston Insufficient Circulation Fault Code
Also written as INSUFFICIENTCIRCULATION — same fault.
The Ariston Insufficient Circulation fault code means: your boiler has stopped working because the water pressure inside your heating system has dropped too low to function safely.. It appears on 1 Ariston model in our database.
Technical description: Insufficient pressure of water in the system (less than 0.5 bar); indicated on the pressure gauge 'J'
DIY fix possible
Locate the filling loop (a silver braided hose) underneath the boiler.Open the valves at both ends of the loop to allow water into the system.Monitor the pressure gauge on the front panel and close the valves once it reaches between 1.0 and 1.5 bar.
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Ariston models that show the Insufficient Circulation fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ariston Insufficient Circulation fault code information on this page is sourced and cross-checked against the official Ariston service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026