Usually this is a sure sign that there is an issue with the garage door s photo eye system.
Trouble with garage door binding and reversing.
You push the button to close the garage door.
Two possible problems can lead to a garage door reversing before it even touches the floor.
If your garage door is closing fully and then reversing to open again then it may be due to a problem with the close limit switch.
Check to be sure these two sensors on either side of your garage door.
Requiring garage door operators to be equipped with a secondary reversing system which most operators have in the form of photo eyes.
In 1993 a law was passed in the u s.
If you garage door is lowering then reversing back to the open position there could be something obstructing the sensors.
In order to fix this you ll want to make small changes to the close limit setting until the door opener knows to stop once the door has reached the floor.
It goes partway down reverses direction and goes back up again.
Garage door openers have an adjustment screw that controls the closing force the pressure with which a door is allowed to descend before the motor switches off.