History - So my A/C was going out about 6 months ago. It would come in and out with cold air until eventually it just stopped all cold air and was only hot. Then the control knobs broke. I took it in and they told me I had to replace the control unit and that would fix all the issues. Well I got it back and the A/C was still blowing hot air (even though the knobs were now working). So I took it back in and they said they couldn't find anything wrong and it must be this hairline crack that was leaking freon. they said they couldn't find the crack but loaded it up with freon and said i would have to 'wait it out' could be years could be a few weeks, they just didn't know. well, it worked for awhile but here i am in 102 degree heat and when I turn on the A/C in the really hot car the passenger side quickly blows cold air and the driver side takes about 20 minutes before it finally gets cold. What gives? I do not have dual temperature controls.