HVACTECH2 wrote in message
I cannot diagnose it without being there but I can tell you that the
gas company is not the ones you want working on it. you should call a
local contractor to work on it. the gas company techs are usually not
very experienced at working on furnaces.

Maybe, but maybe not. There are some great local contractors, there are
some real hacks. There are good technicians with the gas company, there are
some hacks. In a large city like Philadelphia, there are tens of thousands
of furnaces so I imagine they have some experience working on them.