Yellow flame

[Carolyn Smith]

I just replaced the regulator because gas was not flowing to the tube. Now the gas is reaching the tube but the flame is yellow. I have already cleaned the tube with a wire brush and flushed it out. It was done several weeks ago so I am sure there is no water in the tube. Is there an adjustment that can be made?

 

[LMichaels]

Clean the screen at the burner venturi to start with. Also are we in fact talking about a "Q" series grill? If so which model?