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

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

Boiler sooting Emergency

Boiler Fault Code Boiler sooting

Also written as BOILERSOOTING — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code Boiler sooting appears across 1 boiler brand and 2 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is struggling to burn the gas cleanly, which can lead to a dangerous buildup of soot and harmful fumes inside the appliance. (As reported on Ferroli Sigma 40 FF)

Pick your boiler brand for the Boiler sooting fix

Ferroli Boiler sooting 2 models

Source

Information for the Boiler sooting fault code is sourced from the official service / installation manual for each model that displays it. Read more about how we source fault codes →

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026