F10 – A10 High

Ferroli F10 – A10 Fault Code

Also written as F10A10 — same fault.

The Ferroli F10 – A10 fault code means: your boiler has detected an issue with the sensor that monitors internal water flow, meaning it cannot safely determine if water is moving through the system.. 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: Flow sensor error
Typical repair cost £120-£250 (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 F10 – A10 fault code

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

Source

Ferroli F10 – A10 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