This is one of the most common issues with garage doors that operate with a chain drive opener.
Loosen chain on garage door opener.
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.
The chain connects to a threaded anchor that you can move in and out to tighten or loosen the chain as needed.
I am not a professional.
You can put the chain back on your automatic garage door opener using a simple adjustment mechanism.
The chain got loose and popped off the gear.
Documenting how i repaired the garage door.
There are only a few ways that the chain can be tightened.
There may be an adjustment linked to the chain or an adjustment to the length of the door opener track.
Because chains are lubricated with grease you can expect to get a little dirty while putting the chain back on your opener.
The chain on my garage door opener seems to be sagging and rubbing on the track.
Do you have a garage door chain that is loose and knocking against a rail.