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Thanks Labman. I think by applying "logic" I figured it out. What blew my mind is that I said "I will just unhook the jumper to the AC (leave the "4" just to Rh)and it will not work. Wrong. So...

Hello!
I seem to have "developed" a problem tonight. I just removed my old manual thermo and labeled the wiring accordingly. It looked the heat hot came into a spot labeled "4". Then it was jumpered...