Installation Guide
Table Of Contents
Page. 26
3. Repeat the ignition and flame test for each rangetop 
burner. 
The burners that feature XLO
®
, cause the flame to cycle 
on and off when the knob is set to the XLO function. This 
is normal operation.
When flame is properly adjusted:
• There should be a flame at each burner port. 
• There should be no air gap between the flame 
and burner port. 
Call Thermador service if:
• Any of the burners do not light. 
• Any of the burners continue to burn yellow.
Flame characteristics
Yellow flames:
Further Adjustment is 
required.
Yellow tips on outer cones:
Normal for LP Gas
Soft blue flames:
Normal for Natural Gas
If the flame is completely or mostly yellow, verify that 
the regulator is set for the correct fuel. After 
adjustment, retest.
Some orange-colored streaking is normal during the 
initial start-up.
Allow unit to operate 4-5 minutes and re-evaluate 
before making adjustments.










