I have received much benefit and knowledge from reading replies to others no a question about a problem that spooked me since my house was built.
We have Lennox furnace 15 y/o (installed Oct 1993) that's had a sooting problem from the get go. Its fueled by butane and runs from Nov-early April (deep south)
This sooting has will cause the furnace not to fire unless the soot is removed-our builder's HVAC installer recommended using a hair dryer or vac on reverse to blow out the soot. Usually this had to be done monthly to keep it operating fine, yet the flames were never true blue (orange-yellow tinged)
It always heated fine but just wondering if this problem was b/c we used butane for a system that had to been "adapted" from NG to butane.