It could be that they are just barely aligned but the vibration from closing causes them to intermittently break the beam.
Nothing blocking garage door still wont close.
The majority of garage doors manufactured since the early 1990s are equipped with this safety feature.
Could also try disconnecting the door from the chain should be a pull cord that allows this.
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.
If something is blocking the safety beam then the garage door will not close.
The first step to take when your garage door won t close is to look around and do a visual check.
Then try closing the door manually.
First check the sensor lights.
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.
The sensors may not be aligned properly.
Though this problem should be obvious it shouldn t be overlooked.
If there s something blocking the door from closing all the way a full close will be impossible.
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.
These obstructions can include anything like a garden tool a lawn chair or anything else in the way.
One or more of these reasons is likely responsible for your garage door closing partially but not all the way.
Now if there is nothing physically blocking the door and sensors you can check the safety.
Something blocking the door.