My whole HVAC system is down. ive had the car for about 10 months...and about once every three months, the system has shut down. The first time, I went to start my car, started fine but the heat wouldnt come on. It came on about 10 minutes later. The second time, the a/c wouldnt come on when i started the car. came on about 30 minutes later. This time, my heat didnt come on when i started my car a 3 days ago, and it still isnt working...we are having really bad frost and some snow/ice that sticks and it makes driving a pain in the ass cause i cant see out of my windshield and its freezing cold. can anyone help me out? oh, by the way, i can turn the temperature knob to hot and cold and it will change the temperature of the air flowing out of the vents...it just cant push the air out.