One or more of these reasons is likely responsible for your garage door closing partially but not all the way.
Garage door not closing tight at top.
Balancing the weight of the door is the job of the torsion spring or springs which are mounted along the top edge of the door.
So without the springs you might not be able to even open your garage door.
If that is the case you will have to do a spring replacement instead of simply adjusting the garage door.
First check the sensor lights.
Though this problem should be obvious it shouldn t be overlooked.
But the springs that are part of your overall garage door system balance the door in two ways.
Tighten all the screws in both leaves of this hinge.
Once you re finished check the door to see if this has resolved your problem.
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 anything interrupts this beam of light the garage door will not close and the ceiling light on the opener mechanism will flash as mentioned in the previous step.
Tighten the screws on the hinges using a screwdriver.
First you need to see what has caused this to happen.
If there s something blocking the door from closing all the way a full close will be impossible.
This is one of the sensors.
Depending on the brand.
Garage door reversing before closing garage door openers manufactured after 1993 include sensors to prevent a door from closing on a child or pet.
The door should then hang correctly.
It should be taut enough to allow the top of the door to hit tight up against the outside weather stripping when the door closes and hits the floor to prevent drafts.
Adjust this knob to lower the door to the floor but don t adjust it too far or the door will push against the the top.
Garage floor may have cracked or shifted 2.
Garage door opener malfunction or door has shifted.
One controls how far the door closes and one controls how far it opens.
Something blocking the door.
Add screws to any empty holes you see.
If this is not the problem it could well be that the springs of the garage door have stretched causing the shift.
Start at the top hinge which tends to bear the heaviest load of the three.
Garage door seal may be damaged 4.
If it is loose and wobbles around tighten it enough to make it stable and not visibly loose but not too tight that it becomes too rigid and inflexible.
When you have positioned it correctly tighten the lag screw as tight as you can.
One sends a beam of infra red light to the other.
We mentioned that the springs are needed to balance the great weight of the door and make it easier to open and close the door.
If it has not proceed to step 3.
