I have Craftsman Garage Door Opener Model 139.536671 installed since 1997. This morning it suddenly decided to not operate. I used the emergency release handle and put the door in manual mode to close the door. Now I tried to push switch to open the door; the motor started to hum but the chain did not move. After a time the motor stopped. Then I manually opened the door and got the door to lock with the trolley. Now when I used the door switch to close the door, the motor started and there was screeching noise (sounded like the gears were not meshing right). Are the gears damaged and if yes, how do I replace or fix them?
419 views
Usually answered in minutes!
×