Posted after trying these things.
Exactly what happens when you try and close it? Nothing happens
Does the light flash? No
Do you hear any clicking? Yes
Does the LED on the learn button flash. Yes
And if you see any flashing what is the code? 1-2-3 off 3 second count then on 3 flashes.
My guess is that got the switches out of sync.
If you remove the belt will the motor run the full cycle up and down (tell by watchin the gears and the motion of the limit switch assembly.
I ran it that way to see what happens and the motor just runs in one direction(up).
Then run it to down postion and move the belt to then down position. Look the manaul. It is shipped in the down positiion. I was not able to do this.