A54 High

Ferroli A54 Fault Code

The Ferroli A54 fault code means: your boiler's internal computer has encountered a critical electronic failure and can no longer control the heating or hot water safely.. It appears on 3 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 fault

What causes the Ferroli A54 fault?

This fault occurs when the boiler's main control board suffers a hardware malfunction or a breakdown in electronic communication. The most common reason is a component failure on the circuitry itself or an electrical short caused by wear and tear or moisture ingress over time.

Typical repair cost £250-£450 (including labour)

Engineer required

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

Find a Gas Safe engineer

Search the official register for a qualified engineer in your area.

Gas Safe Register →

Ferroli models that show the A54 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Ferroli A54 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