BoilerFaultCodesWhat the manual says
Manufacturer manualPrinted circuit board (PCB) AGC01 error
From this model's manual
Verified against the Ferroli Bluehelix Tech installation & service manual, page 44.
What causes this 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 is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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