Dometic thermostat replacement.

If you have the Dometic touch Tstat with just 3 wires, ONLY the Dometic will work. Did the OEM install a standard 6 to 8 wire tstat cable or just a 3 wire cable? If 3 wire, you will have to run a new control cable from the wall to the roof AC. You will also have to replace The Roof AC control box with the Analog Control box that will accept a standard wall tstat. You need an Analog control kit, but unless you can find someone that still has one from years ago, as Dometic has discontinued that control. You only have the choice of the TC control, which you have or a CCC2 control that requires a 4 wire phone type control cable. The link shows the discontinued part you need. Doug

https://pdxrvwholesale.com/products/dometic-analog-control-kit-3107541009%20