I searched the forum here for power window issues, all the threads I found were for electrical problems; I think mine is mechanical.

The driver's window feels loose in the track and sometimes stops halfway up and then won't go up or down. If I lift up/push down/wiggle the glass, it will eventually "catch" and start working again. The times when it won't go up or down, the motor is not turning. I think there might be a limit switch in there somewhere and the window "thinks" it is all the way up or down and won't respond to the switch. I couldn't find anything that looks like that.

I took the door panel off and couldn't find anything obviously worn, bent or broken.

Any ideas?

 

There are no limit switches. It works on an "overload" principle. If the system detects a high current indicating the window is not moving freerly (at any position), it will stop the motor. Your problem do can be mechanical, but I would more suspect the motor (brushes). If they are worn, the motor works intermitently. If you shake it a bit, the brushes my make a temporary contact and the window finishes its travel. Then the motor stops again.

 

ditto....also spray some pure silicone where glass travels in tracks up and down.