If your garage door opens and suddenly stops it might be because of your logic board.
Garage door only opens a few inches and stops.
There will be two on the chain one for the opening limit and another for the closing limit.
If the door is working properly it should be easy to lift by hand.
Chamberlain liftmaster professional 1 2 hp garage door opener.
Tighten and re align your eyes and you should be fine.
This read more.
The garage door can be operated manually by disconnecting the garage door opener from the door using the red pull cord.
You might need to consider replacing it if your door is not working properly or you may purchase a new opener.
If your garage door is closing fully and then reversing to open again then it may be due to a problem with the close limit switch.
The logic board receives and responds signals to any remote.
Try to operate the garage door manually.
I hit the control agian and sometimes it will go back down and raise agian and read more.
A garage door that only opens halfway becomes a nuisance for many reasons.
This helps you determine if the problem is related to the door or the motor.
Look for trip arms or clips attached to the opener chain.
These may be metal plates screwed on to the chain plastic snap ons dojiggies with flexible metal arms attached etc.
Chamberlain liftmaster professional 1 2 hp garage door opener that tends to open part way say 12 inches or so then stop.
This requires a simple turn with.
My garage door opens about six inches and stops i press the my garage door opens about six inches and stops i press the button twice so it will stop going down and then is goes up another 6 inches or so.
I d bet a small fortune that your eyes are getting bounced around while it is opening shutting and disrupting the process but you will want to be sure you don t have anything major going on by doing the above.
Disconnect the opener from the door itself like so and open it manually a few times.