Manually Close Liftmaster Garage Door

Try opening the garage door with the remote and see what happens.
Manually close liftmaster garage door. These steps should fix most doors. This will cause the trolley to move into position and reconnect to the garage door. Liftmaster is a reputable brand when it comes to garage door openers as well as home automation systems. In this post you will find downloadable links to all models of liftmaster garage door opener manual.
If you pull the emergency release lever while the door is open you can cause the garage door to shut rapidly. To reconnect the garage door to your liftmaster garage door opener manually close the garage door pull the emergency release handle down. It should move smoothly and only require a little force to open and close. Now press the remote control.
A word of warning. Once the lever is disengaged you should be able to open and close your garage door by hand.