New to me and getting her figured out and back on the road.

[Dajain]

UPDATE!!!
The electric side of the furnace has a bad resettable thermocouple. It's not letting continuity flow thru, so the heating element is seeing white lead "juice" but the black wire is dead.

Now, the furnace.
At the furnace, I can bypass the thermostat and furnace lights right up.
Go to the thermostat and do a direct connection of the wires and no furnace.
Traced the wires and from the furnace, the T-stat wire goes thru the loom and goes up into the wall in the bedroom, of all places.
Now, before the wire goes up into the walls, I can jump those across and make the furnace run.
The wire in the basemen is probably 12-14 awg, but the wire at the furnace is regular furnace/thermstat wire.

I'm saying it would just be easier to take the wall panel off, run the wire directly to the T-stat and close it all u than try to chase that wire thru the walls to find the bad connection of stranded and solid wire.

Thoughts? Am I missing anything in that thermostat wiring other than the transition?

 

[TheLooks]

Yes, The furnace is turned on by the control box in the AC unit. It depends on which one you have. But the control box does all the switching while the thermostat tells it what to switch.
You may need another control box or at least pull down the filter and open the box up or take some pics and we can help you.