A06 High

Ferroli A06 Fault Code

The Ferroli A06 fault code means: your boiler is failing to detect a flame after it tries to start up, meaning it cannot provide heating or hot water.. It appears on 13 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: No flame after the ignition phase – electrode error, flame unstable, incorrect valve gas offset or flue gas circuit obstructed

What causes the Ferroli A06 fault?

This fault happens when the boiler's control system cannot confirm that a flame has successfully lit after trying to start. The most common reasons are a worn-out ignition spark or a dirty sensor that fails to 'see' the flame, though it can also be caused by an incorrect mix of gas and air. Because the boiler cannot guarantee it is burning fuel safely, it shuts down as a protective measure.

Typical repair cost £120-280 (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 A06 fault code

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

Source

Ferroli A06 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 31 August 2026