Air conditioner turns on automatically

You are not alone!! We purchased my 2016 Journey used in February. My husband kept blaming me for unsyncing the A/C. It finally did it with us both in the car. It has progressively become more frequent. Today I took video. It turns on after I have shut the system off. Then will unsync every time I hit sync. Sometimes immediately other times it will take 1 minute to everything in between. I noticed the back always turns on high when it does it so I checked the rear control to see it going berserk! The temperature level was moving up and down by itself, and if I tried to turn the fan off high it would immediately go back to 7. I have yet to find an answer, and of course no longer under warranty so I will have to pay to have it looked at.