Liftmaster uses the protector system which projects an invisible light beam across the door opening and automatically opens the door if something someone crosses it s path.
Garage door won t open all the way liftmaster.
Check power door lock the power door lock must be deactivated anytime you open the garage door.
To test the balance and alignment of your door go to how to test the balance of a garage door.
Years ago garage door openers were required to utilize safety sensors to prevent doors from closing on small children.
If the door opens at least 5 feet you may need to increase your travel limits.
If your liftmaster garage door is stuck and won t open it is possible to troubleshoot it in a variety of ways.
This feature prevents the motor inside the garage door opener from damaging.
Fortunately resolving many of these problems can be done safely by the layperson and doesn t require specialized tools.
If you ve checked for obstructions and made sure the lock button wasn t switched to the on position and still your garage door opener won t open all the way check to see if your garage door is balanced properly.
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Your garage door opener is designed to stop.
Doors can get stuck due to problems with their power source photo eyes and track alignment among other things.
If the door is in good working order but still will not open all the way increase the up force.
Liftmaster garage door openers are designed to stop if it senses a resistance or an obstruction while opening.