Depending on the brand.
Nothing blocking garage door still wont close.
Try the wall.
The sensors may not be aligned properly.
The first step to take when your garage door won t close is to look around and do a visual check.
If something is blocking the safety beam then the garage door will not close.
The photo eye components consist of two pieces that align face to face across each side of the garage door roughly four feet above the ground.
One or more of these reasons is likely responsible for your garage door closing partially but not all the way.
First check the sensor lights.
If your garage door won t close all the way the problem could be due to a blocked photo eye.
Though this problem should be obvious it shouldn t be overlooked.
Something blocking the door.
These obstructions can include anything like a garden tool a lawn chair or anything else in the way.
If there s something blocking the door from closing all the way a full close will be impossible.
Could also try disconnecting the door from the chain should be a pull cord that allows this.
Now if there is nothing physically blocking the door and sensors you can check the safety.
What to do when your garage door won t close 1.
Clutter or obstructions that block the sensor are the first problems to look for if your door won t close or in extreme cases open at all.
The majority of garage doors manufactured since the early 1990s are equipped with this safety feature.