F15 High

Ferroli F15 Fault Code

The Ferroli F15 fault code means: your boiler has stopped working because it cannot properly control the fan that removes waste gases from the system.. It appears on 9 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: Fan problem – tachometer signal interrupted fan connection or damaged debris in fan. You need to check and clean fan debris

What causes the Ferroli F15 fault?

This fault occurs when the boiler's computer cannot detect the speed of the fan, often due to a build-up of dirt or debris inside the fan's blades. If the fan cannot spin effectively or communicate its speed back to the system, the boiler will shut down as a safety precaution to prevent dangerous fumes from staying inside the unit.

Typical repair cost £180-450 (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 F15 fault code

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

Source

Ferroli F15 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