This requires a simple turn with a screwdriver to reset the limit so the garage door opens and closes all.
Garage door is opeing about six inches and stopping.
This is a built in safety feature that is there in the event that something or someone gets in the way of the door.
The garage door can be operated manually by disconnecting the garage door opener from the door using the red pull cord.
If the door is working properly it should be easy to lift by hand.
However when connected the door only opens.
Once i get the door up it will go down half way then stop and i have to do through the same process to get it down.
If it senses resistance stops.
The likely reason your door is stopping is because it is sensing resistance.
I have to hit the button maybe 15 times to get it to go up all the way.
This can often be due to a problem with the tracks or rollers.
There is nothing in the way and the sensors are working properly the door works fine by itself manually and the motor works perfectly without the door.
You have an open limit and a close limit on your garage door opener.
Your garage door seems to get stuck while opening or closing.
This helps you determine if the problem is related to the door or the motor.
If your garage door isn t staying open or staying closed you may need to adjust your limit switch which requires only a flathead screwdriver.
These limits set the distance the door will open or close before stopping.
Quite often the cause of your door s malfunction is an improperly set garage door limit.
Garage door only travels a little way and then reverses does your garage door only travel a little way 6 inches or so and then reverse.
Liftmaster provides a helpful resource that explains how to adjust a limit switch.
I have a craftsman 1 2 hp garage door opener from 1997 on one of my garage doors.
Often as a garage door ages its moving parts don t slip and slide as freely as they did when the unit was new.