I have a 2012 Kia Sorrento, 6 cyl with 22k miles. My wife and I have always noted an increase/decease in the intensity of air flow from the AC. I always thought it was engine RPM related. Recently on a trip of about 600 miles, at about 250 miles while driving down the interstate, the air would all but quit blowing. If it was on 1 or 4 it would just tricke out and what was coming out was very warm. We found turning the whole thing off and sweating for about 10 minutes seemed to help temporarily. I took the car in for service for the problem and the service manager said he drove the car 14 miles and could not replicate the problem. Any thoughts or suggestions would be appreciated. Thank you.