First check the sensor lights.
Nothing blocking garage door still wont close.
It could be that they are just barely aligned but the vibration from closing causes them to intermittently break the beam.
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.
The sensors may not be aligned properly.
Then try closing the door manually.
These obstructions can include anything like a garden tool a lawn chair or anything else in the way.
If something is blocking the safety beam then the garage door will not close.
Though this problem should be obvious it shouldn t be overlooked.
Now if there is nothing physically blocking the door and sensors you can check the safety.
Now if your garage door still won t go down after you ve made sure the sensors are properly aligned and there s no obstructions you ll want to take a damp cloth and wipe down the lenses of the sensors.
Try the wall.
Depending on the brand.
One or more of these reasons is likely responsible for your garage door closing partially but not all the way.
If there s something blocking the door from closing all the way a full close will be impossible.
The first step to take when your garage door won t close is to look around and do a visual check.
Could also try disconnecting the door from the chain should be a pull cord that allows this.
If your garage door won t close all the way the problem could be due to a blocked photo eye.
What to do when your garage door won t close 1.