Help! I replaced my main Dometic air conditioner. No problems at all, works great. It had a 7-wire thermostat. I replaced it with a Dometic 3-wire thermostat. Married up the wires, all simple enough, and as I said works great. BUT. My Atwood furnace also worked through the thermostat. After wiring up the a/c and new thermostat, which was all labeled and a no-brainer, I had 2 white wires and 2 orange wires left over. These are heavy wires, not thermostat wires. I have 2 terminals on the control box that say “furnace.” Where do I go from here?