How much does it cost to fix Ferroli error code Boiler sooting?

Typical repair cost for the Ferroli Boiler sooting fault is £120-250 including labour.

Boiler sooting Emergency

Ferroli Boiler sooting Fault Code

Q: What does the Ferroli Boiler sooting fault code mean?

Your boiler is not burning fuel efficiently, which is causing a dangerous build-up of soot and significantly increases the risk of carbon monoxide poisoning.

Also written as BOILERSOOTING — same fault.

The Ferroli Boiler sooting fault code means: your boiler is not burning fuel efficiently, which is causing a dangerous build-up of soot and significantly increases the risk of carbon monoxide poisoning.. It appears on 4 Ferroli models in our database.

Technical description: Faulty flame adjustment. Burner air ports blocked

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 Boiler sooting fault code

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

Source

Ferroli Boiler sooting 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