What's wrong with my a/c?


In early June, I went on a road trip. About an hour in, my a/c stopped blowing cold air. I turned it off and when I turned it back on a couple hours later, it was perfectly normal. I hadn’t had another problem - in over 2,000 miles this summer - until a couple days ago. I was driving in town, lots of stopping and idling, and the a/c stopped for about 5-10 minutes. Once again, it came back on it’s own. However, yesterday, the cold air ceased around noon and never recovered. I was doing a combination of highway and residential driving at the time. I had the freon levels tested less than a week ago and was told they’re fine. The fan blows just like it always has.

I live in Phoenix - please help!