The blower fan on the AC of my 2017 1500 Laramie is intermittently cuts out. When it is on fresh air and the truck is moving cold air comes through the vents, however if it is on recirculate or I'm stopped nothing. I try the manual controls and the touch screen and dothing. As I'm driving the fan is goes off and on multiple times. No rhyme or reason. I have 186k miles so it may be wearing out. Anyone know where it is located? I doubt there is lose wiring but you never know.