If it is not closing all the way set the garage door limit switch so that the door goes to the floor.
How to set limit switch on new garage door.
Using a flathead screwdriver turn the screw clockwise one full turn for every 3 inches you need the door to raise so it opens all the way.
Set the step ladder under the garage door opener in your garage and use it to access the up and down limit switch adjustment screws located on the side of the garage door opener motor housing.
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.
Go to the manufacturer s website or try manuals online they may have a copy that you can download.
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.
Open and close the garage door.
If you can t find it there consult your user manual for reference.
Stand on a step ladder to reach the up limit switch adjustment screw on the side of the garage door opener.
Set your multimeter to continuity or resistance and connect it to the two indicated terminals on the switch.
It is also possible that the limit switch is located in the opener mechanism.