Garage Door Opener Chain Seems Loose

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Garage door opener chain seems loose. Documenting how i repaired the garage door. Sometimes extremely loose word hangs a few feet under the garage door motor rail. It was nearly a direct swap and all works as desired except. Remember to not over tighten the chain.
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. When opening the door the belt on the non pulling side is very loose. I am not a professional. Just tighten enough to stop it hitting the rail.
Do you have a garage door chain that is loose and knocking against a rail. This can happen whether you have a chain driver garage door opener or a belt driven garage door opener. The chain got loose and popped off the gear. 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.
This is one of the most common issues with garage doors that operate with a chain drive opener.