2016 Premium. Not long after we got the vehicle the rear AC went out. Just stopped blowing cold. Spent three weeks in the shop and the entire dash torn out to get it fixed. Two weeks ago, the same thing has happened. Exact same thing. Blowing warm air even with the temp set on low but front two zones work perfect. I'm highly concerned of the reliability of the rear AC system. I'm still in my extended warranty thank goodness but that will soon be over. I can just imagine what this repair would cost. Took them three weeks. Anyone else have any issues with the rear AC not blowing cold?