BoilerFaultCodesFerroli A61 Fault Code
The Ferroli A61 fault code means: your boiler's internal computer brain has detected a serious electronic failure and can no longer control the heating software correctly.. It appears on 7 Ferroli models in our database.
Technical description: Printed circuit board (PCB) AGC01 error
What causes the Ferroli A61 fault?
This fault occurs when the boiler's main control board suffers a critical electronic failure, often caused by a power surge or localized component burnout. The most common reason is simply the natural degradation of the electrical circuits over time, which prevents the computer from executing the software needed to fire the boiler safely.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Gas Safe Register →Ferroli models that show the A61 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ferroli A61 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 27 April 2026