BoilerFaultCodesFerroli A64 Fault Code
The Ferroli A64 fault code means: your boiler has been manually reset too many times in a short period and has now locked itself out for safety.. It appears on 7 Ferroli models in our database.
Technical description: Maximum number of consecutive resets exceeded
What causes the Ferroli A64 fault?
This fault occurs when the boiler has been manually reset five times within a 15-minute window, causing the system to lock down as a security measure. It is usually triggered because an underlying issue, such as a failure to ignite or a flame sensing problem, led the user to keep pressing the reset button. The boiler stops responding to prevent potential damage or safety risks from repeated failed start-up attempts.
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 A64 fault code
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Source
Ferroli A64 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