Guide :Building Materials : Craftsman LiftMaster Chamberlain Garage Door Opener Wireless...
Garage dr won't close because trolley interferes with rail joint
The door can't open because the interference causes the door to go back up. There is a loud bang when this occurs. I disconnected the door from the tolley and tried to fiddle with it and it seemed to fix the interference, for one closing. Then it went right back to interfering.
Anyone else experience this problem?
It's a Sears Craftsman opener, around nine years old.