Typically this is caused by a mis adjustment.
Liftmaster garage door trolley jammed into stop bolt.
Do you know what i need to do to limit the movement of the door model 139 53650srt craftsman.
See how to get the trolley off the stop bolt or stop tab.
When my craftsman garage door opens up it goes all the way up until the trolley hit the safety pin.
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Back off the uptravel limit screw 2 turns.
The up down limit screws are on the opener body with arrows above to indicate increase.
Eventually it becomes a problem with driving the door into the ground or in your case driving the trolley up onto the bolt.
A problem came along after the assembly was complete and i tested the garage door opener.
Chamberlain group cgi the corporate parent company to liftmaster chamberlain merlin and grifco is a global leader in access solutions and products.
Recently it opened all the way until the trolley hit the bolt that stops it from going any further.
I have compared with the other garage door opener i have and it stops on the way up 1 2 inch before the trolley hits the safety screw bolt.
I decided to unbolt the chain from the trolley to allow the opener to move again.
The trolly was parked where the door would normally remain closed.
When i disconnected the door it seemed to open and close by hand smoothly.
The garage door opener motor will hum when attempting to open or close the door but is unable to travel due to being lodged against the bolt tab.
Loosen the chain or belt to relieve the tension then press the door control to run the trolley to the close position.
When i pushed the button the door began to open but it didn t stop and hit the stop bolt causing a lot of stress on the chain.
Once it topped out the opener stuck there.
We design and engineer residential garage door openers commercial door operators and gate entry systems.
What you need to do is back off the uptravel limit adjustment.
Opener trolley is stuck against the rail stop bolt.