Emergency
Boiler sooting on Ferroli Optima 201

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.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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

Faulty flame adjustment. Burner air ports blocked

Engineer required

This is a emergency severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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