Grant 10 Fault Code

The Grant 10 fault code means: your boiler is struggling to clear its exhaust gases properly, which can be dangerous and indicates a potential issue with your chimney or ventilation.. It appears on 11 Grant models in our database.

Technical description: Fumes and puffing during starting (conventional flue). Check the condition of the chimney, ensure it is not blocked and is high enough to produce the required draught. Check that there is an adequate air supply near the burner and that a kitchen fan is not drawing products out of the burner.