We bought ours of the lot also and got a great deal. The A/C is not a big deal and it makes sense that the duct work would all be connected. We had my Mom with us this weekend and one night needed to run the air.. We had our door shut and just before I fell asleep realized that our A/C had not run but the front one right over her head was not shutting off. I'm glad I figured it out as it would have been a long night with that blasting away.
Phil and Dianna
2011 Berkshire 390 RB