How much does it cost to fix boiler error code Frequent sooting (2)?

Typical repair cost for the boiler Frequent sooting (2) fault is £150-350 including labour.

Frequent sooting (2) Emergency

Boiler Fault Code Frequent sooting (2)

Also written as FREQUENTSOOTING2 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Frequent sooting (2) appears across 1 boiler brand and 1 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 breathe, which is causing fuel to burn incorrectly and creating internal soot build-up. (As reported on Chaffoteaux Flexiflame 140)

Pick your boiler brand for the Frequent sooting (2) fix

Chaffoteaux Frequent sooting (2) 1 model

Source

Information for the Frequent sooting (2) 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 27 April 2026