Ferroli F61 – A61 Fault Code
Also written as F61A61 — same fault.
The Ferroli F61 – A61 fault code means: your boiler's main internal computer has developed a communication fault and can no longer control the heating process safely.. It appears on 3 Ferroli models in our database.
Technical description: Printed circuit board (PCB) AGC01 error
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 F61 – A61 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ferroli F61 – 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