Totally fixed (we have furnace heat) thanks to responses from this forum, Newmar Service support and Dometic Customer support who sent the Installation Manuel.
All I had to do was remove the top cover of the air conditioner and two screws that held the cover plate to expose the multiDip Switch panel. Using a small screwdriver I flipped on the Furnace switch. Fixed!
So, when you have service done to your air conditioner, a new install in my case several months ago, don’t be a DIP like me. Make sure your DIP switches are properly set on the unit.
Thanks again for all of your responses.