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.
This feature prevents the motor inside the garage door opener from damaging.
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.
In some cases faulty springs or incorrect balance inhibit your liftmaster from opening the garage door all of the way.
If your liftmaster garage door is stuck and won t open it is possible to troubleshoot it in a variety of ways.
Doors can get stuck due to problems with their power source photo eyes and track alignment among other things.
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Your garage door opener is designed to stop.
Fortunately resolving many of these problems can be done safely by the layperson and doesn t require specialized tools.
Check power door lock the power door lock must be deactivated anytime you open the garage door.
To test for balance open your door s emergency release handle and open and.
If your garage door is not balanced right it won t go up or down all the way.
If the door opens at least 5 feet you may need to increase your travel limits.
If the door is in good working order but still will not open all the way increase the up force.