BoilerFaultCodesFerroli Low system pressure Fault Code
Also written as LOWSYSTEMPRESSURE — same fault.
The Ferroli Low system pressure fault code means: your boiler has stopped working because the amount of water inside your heating system has dropped too low to operate safely.. It appears on 2 Ferroli models in our database.
Technical description: Fill the system to 1-1.5 bar.
DIY fix possible
Locate the external filling loop, which is a flexible braided hose underneath the boiler.Open the valves at both ends of the hose to allow water into the system until the pressure gauge reads between 1 and 1.5 bar.Ensure both valves are tightly closed and check for any visible leaks on your radiators or pipework.
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Ferroli models that show the Low system pressure fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ferroli Low system pressure fault code information on this page is sourced and cross-checked against the official Ferroli service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026