So we bought a new/old house and the AC worked just fine, but naturally we didn't test the heat, as we bought it in the summer and we live in Florida. It has an old gas/electric HVAC system (Central Furnace, model number DCHG-F036N100B), that I figure we will have to replace soon, but I'm hoping I can get some use out of it first. The temp is dropping into the 40s tonight and so I tried cranking up the heat. Nothing. I followed the instructions (there is no pilot, just an electric igniter). Nothing happened. Gas was in the ON position, (now off). I don't have a clue as to where to start with this thing. I'll attach a few pictures and I will appreciate any thoughts. Thanks!