Pictures or a video would help. However, I suspect the motor has failed or is binding and now stuck.
There is a chance that you could just adjust the panel and it will be fine but if not you will most likely have to stop taking things apart to find out what is going on.
Below is all the info on adjusting the panel.
If this does not work, let us know and we can dig deeper but again, I suspect we are going to have to start dropping the head liner and find out what is happening in there.
Images (Click to make bigger)
Wednesday, May 26th, 2021 AT 7:58 PM