Hi The motor is not holding the door up after is wound up to the top. It starts to unravel.

Is there an issue with the brake?

Where is the brake on the motor?

 

Hi,
I'm not being picky. But to avoid confusion, I think that you mean Brake.
Good luck.......

 

Not familiar with that one, but most do not have a BRAKE, usually the worm and pinion does not allow back-feeding.

 

What does this set up do ?

 

That appears to be top and bottom limits (open & closed)