Now it will go up halfway and then on its on goes back down. Holding in the up button on the outside wall switch outside of the elevator does not make it go all the way up. It will still go back to the first floor. On the second floor there are two horizontal wall switches just above where the 2nd floor begins (photo attached). The elevator gets to the bottom switch and you can see that it is pressed it in but then the elevator will go back down before touching the top switch.

I took the bottom switch out and there are no obvious signs of anything wrong when taken apart. How does switch works? Is it to detect any obstructions?

Can anyone give me any ideas what might be causing this problem and the fix.

I have attached several photos I hope will help.

Thanks.