1997 Newmar. Do you have the 4 button(4 button was OEM on your model) or 5 button? The 5 button has the button that says ZONE. Have you had the front roof top AC changed in the past year? The furnace will ONLY show when the DIP switch on the front AC control board is turned ON. IF you have had a New AC or a new AC control board changed, then they did not push the Furnace DIP switch ON. Also, on your year model Newmar, there is 2 sets of ATC 12 volt fuses AT the furnace casing. You can see them either from the inside wood louver after removing or pulling the outside metal cover and they will be seen where the LP line connects. One fuse goes to the storage heater blower motor and the other is a 2nd fuse going to the furnace, not just the 1 at the main fuse panel. You DO know how to change Zones on a 4 button CCC, correct? The furnace will be on Zone 1. What Zone is showing? Doug