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