Craftsman 139.53673SRT Garage Door Opener
Our header bracket recently came loose from the 2x4 on the wall above our garage door. It had been nailed into the wall, and I re-drilled it with screws, also still using the original nails and making sure they were in the same holes so I knew the 2x4 was snug to the wall again. Now when we open the door with either opener, the door goes up maybe 2"-3" off the ground and stops, each time right when the outer trolley/door arm connects with the inner trolley.
Also, when the trolleys connect, the whole length of the t-rail then bows up a few inches toward the ceiling as if it's too long for the distance between the wall and the opener unit.