Carrier was the WORST in RV AC units. That is why they are no longer in the RV AC business. You only have 2 choices for RV roof top Units. Do NOT think the 3rd (Advent) is in consideration. They are a cheap China knock off of Dometic.
1. Dometic
2. RVP (Coleman).
The furnace is not a real factor as both RVP and Dometic control kits have the 2 wires for the furnace function. You will have to change out the wall tstat and the upper control board/s when you go to the new AC units. The Carrier control system is not compatible with the RVP and Dometic systems. IF you have the remote control Carrier tstat system, then you will have to run the tstat wiring to where you want the wall tstat. Doug
