Check alignment of the obstruction sensors .... they shoot a light beam across the doorway about 6 inches above the floor. One is mounted on each side of the door track near the floor.
SOURCE: Lift-Master GDO goes up, not down
If the door operates freely without any binding, while operating it manually then It would appear that the obstruction sensor mounted across the doors path is ether out of alignment, lens dirty,or malfunctioning
SOURCE: Grage door reverces and goes back up after touching the ground
ADJUST THE CLOSE LIMIT SWITCH UNTIL THE DOOR CLOSE SOFTLY, UN CAN DECREASE IT BY TURNING THE FLAT SCREW COUNTERCLOCKWISE.... VERIFY THAT BOTH LEDS OF THE PHOTOCELLS ARE ONE.. OTHERWISE U GONNA HAVE TO ALIGN THEN OR REPLACE IT!
SOURCE: Garage door will not close from remote or car.
wI have never heard of this problem. you have to hold the button on your wall in to close the door. no way this is not right something wrong with your board insid the opener. get help from a pro. I would love to see this been doing this for 20 years never heard of this.
SOURCE: Door goes up, Won't go down.
It sounds like the limits are out of adjustment. With the door down, rotate the down limit until it clicks. Then raise the door manually, and set the up limit until it clicks. You should be able to hear the switch 'click' when it activates. Pay attention to which way the plastic nuts are moving on the screw going up and down. That way you know which way to turn them to set it.
If you need further help, I’m available over the phone at https://www.6ya.com/expert/craig_3fa289bf857b1a3c
SOURCE: Door won't close unless I hold the button all the way down.
make sure the eyes are clean and aligned if the opener thinks something is obstructing its path it will not close
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