Your Barbecook Grill might not be hot enough due to several reasons: The gas supply may not be open, so ensure it is. The venturis might not be placed correctly over the gas valve openings; adjust them accordingly. The burner openings could be blocked, requiring cleaning or replacement. Also, check if the gas cylinder is empty or almost empty and replace it if necessary. Finally, verify that the pressure regulator is correctly connected to the cylinder and/or hose, and reconnect if needed.