Hello everyone. I've recently had some troubles with my A/C. Randomly my A/C stopped working as I was driving to work. No noises occurred when it stopped. It just all of a sudden started blowing hot air. The clutch still activates when I select A/C, the Freon pipes still get really cold, the vacuum line going into the firewall isn't severed, and sometimes I can actually get cold A/C to blow through the vent if I switch the temperature knob from hot to cold enough times. Does it about once ever 7 tries. Anyone have any ideas about what is causing this?