Kevin, Glad you had good luck, and you found those DIP switches! I took our '05 Patriot to a local shop to replace a non-working A/C. Like you found out, it should be simple, right? Anyway, they couldn't get the new unit to work after two months, so we started travelling and found another shop north of Eugene Or. They found our local shop had run 120v on the aqua hot wires, burned up the aqua hot board and fried the rear AC too! So they replaced both ACs new boards, new tstats. Should be simple, right? I did learn that with two roof ACs, they are not connected by the phone cable; that connection is only needed for three ACs so they can talk to each other. I still have to get to the rear AC and correct a DIP switch setting, but all works!