BoilerFaultCodesFerroli Bottom red light Fault Code
Also written as BOTTOMREDLIGHT — same fault.
The Ferroli Bottom red light fault code means: your boiler has stopped working because the water pressure inside the heating system has dropped too low.. It appears on 1 Ferroli model in our database.
Technical description: Low water pressure indicated on the left hand side of the facia
DIY fix possible
Locate the filling loop, which is usually a flexible silver hose or two valves sitting underneath the boiler.Open the valves slowly to allow water into the system until the pressure gauge needle reaches the 1 to 1.5 bar mark.Close both valves tightly to stop the flow of water and check if the red light resets.
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Ferroli models that show the Bottom red light fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ferroli Bottom red light 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