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.

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.

What the manual says

Manufacturer manual

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

From this model's manual
Verified against the Grant Euroflame Condensing installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

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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