I was driving my car about a week ago, using my air conditioning and it was working great. It worked so great that when my friend stepped out of my car, his glasses fogged right up. I've had NO issues with it at all and I really haven't noticed it getting warmer at all. Then yesterday I went to go use it while on the highway, and ALL I got was warm outside air. I cranked it, I turned on max and turned the fan on high (it makes both fans blow over the radiator) and nothing, rode like that for probably 5 - 10 minutes and it didn't cool down at ALL. could this be a fuse? What can I do to diagnose this issue?