How much does it cost to fix boiler error code I / Fume Sensor?

Typical repair cost for the boiler I / Fume Sensor fault is £120-250 including labour.

I / Fume Sensor Emergency

Boiler Fault Code I / Fume Sensor

Also written as IFUMESENSOR — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code I / Fume Sensor 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 has detected an issue with the system that ensures dangerous exhaust fumes are safely removed from your home, so it has shut itself down as a safety precaution. (As reported on Ariston Egis 24 MFFI)

Pick your boiler brand for the I / Fume Sensor fix

Ariston I / Fume Sensor 1 model

Source

Information for the I / Fume Sensor 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