Indy shop just called with their diagnosis. Said the cooling fans are not pulling enough air through the condensor (totally possible and this was my first attempt to fix this a month ago, I took out 1 fan that was not working and put in a cheapo fan that didn't really fit, but I made it fit).
My question is, why is the compressor locking up? The mechanic guy said because the pressure is getting out of whack when the refrigerant doesn't get cooled down enough. He said that because the AC works when you first turn on the car and only stops working when the car heats up, the compressor is probably fine. Thoughts?