The set screw only needs to be loosened enough to allow the bracket to slide on the rail.
How to set limit switches on garage door.
Using a flat blade screwdriver raise the door up by turning the up limit screws in a clockwise direction.
Repeat the same with the down limit in anticlockwise direction.
Press the button on your remote to open the garage door.
Switches requires the use of a screw drive or socket to loosen the set screw on the limit switch bracket.
It should show no connection no continuity or full resistance push on the switch button or push the spring arm to push the button and the meter should show a connection between the two probes.
The chain trolley might move and if it does leave a gap of 2 to 4 inches between the trolley and the cover protection bolt.
When the garage door opens about halfway or 5 feet from the ground and stops the up.
A garage door that fails to open fully can be fixed by adjusting the limit screws.
Measure the distance from the top of the garage door opening to the bottom of the garage.
Open the garage door and watch it closely as it opens.
Measure the height where the door stops while it is being opened.
It is also possible that the limit switch is located in the opener mechanism.
How to reset garage door opener limit switches.
Stand on a step ladder to reach the up limit switch adjustment screw on the side of the garage door opener.
If the door is closing and reversing you need to set the limit switch so that it stops the door sooner.
On certain garage door models the limit switch is located on the tracks.
If it is not closing all the way set the garage door limit switch so that the door goes to the floor.
Garage door doesn t open all the way.
The measurement is used to reset the up.
If you can t find it there consult your user manual for reference.
Set your multimeter to continuity or resistance and connect it to the two indicated terminals on the switch.
Go to the manufacturer s website or try manuals online they may have a copy that you can download.