Maybe this will help. Each column is a piece of equipment in the puzzle and how they are connected. Hope this view properly at your end. Thermostat is Heatpump enable
HP=Heat pump Furn=Furnace force air Tstat=Thermostat
Tstat Furn HP
[R]-----------[R]--------[R] Heat [C]-----------[C]--------[C] Common [AUX/E]-----[W]--------[R2] Emergency heat [OB]--------------------[O] Heat/cool valve [G]----------[G] Fan [Y]-----------[Y]--------[Y] Cooling
