Did have to replace the Thermostat for my new Brisk Air 2 as my old 05 Montana had a legacy “fancy “ Dometic Thermostat with a remote and a phone style connector that I think they only made for 2 years…
Replaced Thermostat With Dometic “Single Zone LCD Thermostat “ 3313192 AC/Furnace
Online Wiring diagrams enabled connecting the old wiring in the wall minus the legacy connector.
Extension Ladder with DW pushing the box and I on the roof pulling with a rope worked well enough
The rest was “easy “ I’ve replaced both AC units that way.
