If the garage door stops look okay but the door is out of plumb not perfectly vertical when closed check the vertical sections of the roller tracks on each side of the door.
Garage door is not closing evenly.
Repairing your garage door springs can be a dangerous job due to the weight of the door.
When this happens you need to shift it back into position.
Do not attempt to do this yourself.
If you suspect you need to adjust one or both of the extension.
Put a ladder under the door to make sure it won t close accidentally while you re working on it.
When the settings are too high the door senses the floor as an obstruction and immediately opens again after closing.
Keep the door open a few feet off the ground as this takes the pressure off the door springs.
The extension springs are evenly matched and installed to keep the garage door properly aligned so that it runs smoothly throughout the entire length of the track and closes evenly.
They should be plumb and hold the door at a consistent distance from the side stops assuming the stops themselves are plumb.
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.
Have a helper steady the ladder.
This can happen when the door has shifted to one side causing it to appear uneven.
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.
If the door simply stops short of the floor the likely culprit is the down limit switch.
Some times you need to adjust the garage door.
If your door has a gap on one side or the other when it s closed the problem is most likely due to a break or other issue with one of the extension springs.
Place a stepladder beneath the box portion of the garage door opener.
The most simple and common is door shift.