Picture yourself driving on a hot summer day, enjoying the cool breeze from your car's air conditioner. Suddenly, you notice that the air coming out of the vents is no longer cool, but warm instead. You turn up the dial, hoping that it's just a minor glitch and that the AC will start working again. But no such luck. Your car AC is dead, and you're left wondering why it suddenly stopped working. The truth is, there are several reasons why your car AC could stop working, and it can be frustrating to diagnose the issue without any prior knowledge. ...