my car usually stays at about 210 most of the time. i turned the manual fan switch on today and my car stayed there. wouldn't move at all. i've also been having this problem: everytime i turn on my a/c the car starts getting hot. turn off the a/c, car is fine. i'm wondering if my high speed fan is working. i mean, with the car off and key on, i can flip the switch and hear the fan come on. so i don't understand. anyone have any good ideas?