F61 – A61 High

Ferroli F61 – A61 Fault Code

Also written as F61A61 — same fault.

The Ferroli F61 – A61 fault code means: your boiler’s internal computer has developed a serious fault and can no longer control the heating process safely.. It appears on 2 Ferroli models in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: Printed circuit board (PCB) AGC01 error
Typical repair cost £280-450 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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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 7 July 2026