Gold Founding Member
Join Date: Aug 1998
Location: near Kansas City
Re: Natural GAs Furnace Flame "Walking" on 1 Burner
Things that cause the flame to dance or lift or not burn at their proper place usually are -
1) dirty burner
2) stopped up heat exchanger
3) hole in heat exchanger
IF the flame tries to roll out of the combustion chamber or even rolls down it is most likely #2
1 & 2 both require removal of burner and cleaning while #3 means new furnace time.
See any difference if you stop the blower?
sometimes the flame will be blown away by the fan if there is a hole in the heat exchanger.