Sometimes the fix can be as simple as replacing the batteries in the opener and.
Garage door not closing fully on one side.
They both have lights and both lights should be on.
If the door was closing too quickly move the spring to the next higher hole on the bracket.
Or it could just be that the hardware has become loose over time.
Adjust the springs on both sides of the door the same way.
It is possible that the vertical track down the side has gone out of alignment and shifted due to a slightly loose lag screw.
Garage doors sometimes seem to have a mind of their own often deciding when and how far they want to open or close.
Push the door back to adjust the door and get the center aligned again.
The door runs are housed in a garage door track one on each side of the garage door.
Side mounted extension springs are installed above the horizontal roller tracks on both sides of the door.
If one side of the door is not in line with the other the door won t run smoothly in its tracks and when closed one side of the door won t close completely leaving an open gap.
If it was opening too quickly move it to the next lower hole.
If you ve had your door for a while or are in and out of it a lot it can easily end up out of alignment.
Retest the door balance as you did in step 1.
Something blocking the door.
Though this problem should be obvious it shouldn t be overlooked.
First you need to see what has caused this to happen.
The reasons your garage door has a gap in it could be.
If there s something blocking the door from closing all the way a full close will be impossible.
These 7 reasons are to blame one or more of these reasons is likely responsible for your garage door closing partially but not all the way.
Garage door sensors may not be aligned correctly 3.
If the door is all the way up there is more tension in the cable on the side with the problem.
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.
Check that it is straight.
Is your garage door not closing.
There is one on each side of the door.
Maybe the spring is just holding that side from closing all the way.
Garage door seal may be damaged 4.
Garage floor may have cracked or shifted 2.
Maybe someone bumped into it recently.
If the door goes up but you can t make it go down you probably need to adjust the sensors.