As most of y'all know I had some issues w/my 15 y/o furnace. Today, I opened the outside to let in fresh(cold) air, removed the furnace service door, and turned it on to observe the flame. I can post pix if needed.
1) Flame wasn't blown about and nearly flattened after blower kicked in
2) Flame pop up quickly, no lagging
3) Flame was not totally blue, in fact the burner row on the return side were 1/2 orange 1/2 the other 2 burners were about 1/4 orange and 3/4 blue.
I observed about 5 min w/blower on, clicked it off and it flamed off w/out a problem and blower quit about 2 min later.
Should I be expecting a totally blue flame or is that just w/NG?