I had this happen a couple of years ago about 4 times. It was still under factory warranty and they kept replacing the motor, then it would go out again. Well the last time it happened, it was both windows (before it was just the drivers side) and it was not under warranty. So, I waited a bit to decide what to do. I kid you not, all of a sudden they started working again. And I haven't had the problem since...?!?!?! I just tell the kids, dont slam the door, thinking it could have been slammed once and screwed something up...it was wierd. | 
