My wife has an 06 Chevy Aveo that recently started getting overheating engine problems. What I noticed is that the car will be at the correct temperature with the A/C working at the beginning. Then you'll notice that the A/C goes out (The fan still blows though) and the engine will begin to overheat. The needle will go between the 1/2 and 3/4 tick marks. Now the strange thing is if you keep driving the cars A/C will turn back on and the car will start to cool down again but then go out again. I checked the fluids and there doesn't seem to be any leaks. I hope one you guys on here will have more knowledge on what it could be since I don't exactly have a lot of money to throw on parts that could be the problem. Thank you for any advice give.