BoilerFaultCodesFerroli A Fault Code
The Ferroli A fault code means: your boiler has completely stopped working as a safety precaution and needs you to press the reset button to try and restart it.. It appears on 2 Ferroli models in our database.
Technical description: Permanent shutdown; requires manual reset by pressing the 'R' button
DIY fix possible
Locate the reset button, usually marked with the letter 'R' on your boiler's control panel.Press and hold the 'R' button for about 2 to 3 seconds.Wait to see if the boiler fires up and the fault code clears; if it immediately locks out again, do not keep resetting it.
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Ferroli models that show the A fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ferroli A 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 31 August 2026