There are only a few ways that the chain can be tightened.
How to adjust your garage door chain.
Lift up the door halfway from the inside using one of the cross members.
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Close the garage door.
Both adjustment types should be done with the door closed and disconnected from the opener using the emergency release.
Adjustments on the chain are located at or near the master link where the chain engages with the cable graphic below left.
Position a stepladder at the area of the automatic opener.
On the master link you will see two or three nuts.
Usually a pair of nuts are associated with the locking mechanism while one is concerned with the adjustment of the chain.
Use the wrench to loosen the lock nuts and turn the adjustment nut to set the slack in the chain.
Open the door fully by hand.
If you find that your garage door opener chain has become loose with time you may want to tighten it up in order to remove some of that slack.
Just tighten enough to stop it hitting the rail.
The chain is a very important component that makes up a garage door opener system.
If the door remains at the halfway position.
You can adjust your garage door chain using adjustments located near or at.
Unplug the power cord to the opener.
There may be an adjustment linked to the chain or an adjustment to the length of the door opener track.
Adjust the chain on a garage door opener with help from a garage door spec.
Remember to not over tighten the chain.
Some garage doors have chains that utilize a tubular style track.
Adjusting the length of the garage door opener track.
You may find that a loose garage door opener chain has less power to open and close your garage door or you may find that it is just hitting the door as it moves it and creating an annoying sound.