How much does it cost to fix Ferroli error code 15?

Typical repair cost for the Ferroli 15 fault is £100-300 including labour.

15 High

Ferroli 15 Fault Code

Q: What does the Ferroli 15 fault code mean?

Your boiler has failed to ignite and cannot produce heating or hot water because it is not receiving or detecting a gas supply.

The Ferroli 15 fault code means: your boiler has failed to ignite and cannot produce heating or hot water because it is not receiving or detecting a gas supply.. It appears on 3 Ferroli models in our database.

Technical description: Boiler failed to light. Make sure that the gas isolation valve on the boiler and on the gas meter are open. Press the RESET button (2 Fig. 1).

Typical repair cost £100-300 (including labour)

DIY fix possible

Check that your gas emergency control valve (at the meter) is in the 'on' positionEnsure the gas isolation valve underneath the boiler is fully openPress and hold the 'RESET' button for one second to clear the fault

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Ferroli models that show the 15 fault code

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

Source

Ferroli 15 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