Hello everyone. I'm from Arkansas and I have 2 Awesome Ford diesel trucks , 02 F350 7.3 Super Duty and a 05 F250 6.0 Super Duty. I need some help with my 02 7.3 a/c system. It started to blow warm air after driving for a little while and now it doesn't blow hard either ? I need help because its HOT in Ar. Thank you for any advice.