Emergency
14 on Ariston Microsystem 15

Your boiler is struggling to clear fumes properly, so it has safely shut itself down to prevent carbon monoxide buildup.

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

General check of the discharge/ventilation of the combustion byproducts.

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.

Find a Gas Safe engineer
Search the official register →

Related fault codes

Related guides you might find useful