Emergency
10 on Grant Euroflame Condensing

Your boiler is struggling to breathe because the exhaust pipe is likely blocked, causing smoke or fumes to leak out when it attempts to start.

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

Fumes and puffing during starting (conventional flue). Check the condition of the chimney, ensure it is not 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.

Find a Gas Safe engineer
Search the official register →

Related guides you might find useful