It is my understanding the newer Dometic A/C units do not use the "older" 5 button T-stat. If so, this would require a replace too. However, the cabling remains the same. I don't have first hand experience with this, but read it multiple times (and it was on the internet so it must be true).
In any case, it is worth looking into before purchasing an new hardware. Good luck.
05 Travel Supreme Envoy 38DS04
CAT C7, 350 HP