Climate Control

[gsx72000]

I'm just wondering if anyone else had issues with the dual auto climate control in their trucks. I had an '11 Silverado 1500 which would only blow 90 on one side once in a while. To add to this I had a 99 Buick that did the same thing twice to me and I had to replace the mixing doors in the dash along with the head unit which was very expensive. So I ask has anyone else had this issue?