Fume thermostat activation Emergency

Ferroli Fume thermostat activation Fault Code

Also written as FUMETHERMOSTATACTIVATION — same fault.

The Ferroli Fume thermostat activation fault code means: your boiler has detected that waste gases are not being cleared away properly, so it has safely shut itself down to prevent dangerous fumes from entering your home.. It appears on 1 Ferroli model in our database.

Act immediately

Turn off your boiler and stop using gas appliances. Call a Gas Safe engineer now. This fault can be dangerous if ignored.

Technical description: Fume thermostat activation due to obstruction in the circuit or combustion ducts or bulb damage.
Typical repair cost £120-250 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Ferroli models that show the Fume thermostat activation fault code

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

Source

Ferroli Fume thermostat activation 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 7 July 2026