Sorry to revive an old thread but I just ran into the same issue. My only problem though is that on top of the hvac not working, my power locks, trunk release, and 12v sockets also died at the same time. I checked fuses and they all seem to be ok. Also the alarm still works but it will only arm if the doors are physically locked first. Nothing works still with the resistor unplugged or the new one in. Also when it died completely, the a/c no longer turns green on 1. Originally it was a/c green on 1, only blowing on 3 and 4.