Bosch NGMP659UC Manuel D'utilisation page 13

4.6 Sealed burners
Your cooktop has sealed gas burners. There are no
burner parts under the cooktop to clean, disassemble or
adjust.
4.7 Flame characteristics
The color of the flame tells you if the gas supply is properly adjusted.
Note: Allow the appliance to operate for 4 to 5 minutes before evaluating the flame. Some yellow streaking is normal
during the initial startup.
Flame Image
Completely or mostly
yellow
Yellow tips on outer
cone
Soft blue
Familiarizing yourself with your appliance en-us
Your cooktop has four different burner sizes; small,
medium, large and dual-flame. Match every burner cap
with the corresponding burner base.
Measure
Verify that the regulator is set for the correct fuel. Retest
after adjustment.
Normal for LP gas
Normal for natural gas
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