Clearly something is binding catching or blocking the door sections or roller wheels in the tracks.
Manual garage door won t stay closed.
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.
First check the sensor lights.
To test for this use the manual release handle rope hanging from garage door opener track to release the garage door from the opener.
Check the motor housing mounted to the ceiling of your garage.
It is also possible that the door is becoming wedged as it gets toward the lowest position.
Your garage door may be binding i e not rolling smoothly along the garage door tracks.
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If you re craftsman chamberlain etc garage door opener is closing and then opening up its likely a common problem related to the stop limit mechanism.
Locate the cable clip that is attached to an s hook toward the front of the horizontal track.
Start by rotating the down limit screw or knob one complete turn in the minus direction.
It could be as simple as one of the track mounting bolts has come loose and is binding with the roller as it tries to go by.
This could cause unnecessary damage.
Start by checking the rack and the rollers to see if something has become stuck.
Manual garage doors if your garage has a manual door meaning one that s opened and closed by hand and the garage door refuses to go down do not force it.
Adjusting the limit travel setting the most common reason as to why a garage door won t stay closed is that the limit settings are off.
Adjust in small increments a half turn or less.
Continue adjusting until the door opens and closes satisfactorily.
With this tool in hand follow these steps.
Secure the garage door in this position by clamping vice.
Test after each adjustment.
Test the garage door to see if it stays.
How to adjust manual garage doors to stay up step 1.
Adjusting the travel setting on a garage door opener.
The craftsman garage door opener shown here has two set screws that control door travel.
Depending on the brand.