What does a normal burner flame look like on this cooktop?
The burner flame should be blue in color and stable with no yellow tips, excessive noise, or fluttering, and it should burn completely around the burner cap. Foreign particles in the gas line may cause an orange flame during initial use, which should disappear with regular use. (Page 5)
From the official Bosch NGT73, NGP73, NGT93, NGP93 Gas Cooktops manual, page 5
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