This is one of the most common issues with garage doors that operate with a chain drive opener.
Garage door opener chain seems loose.
Sometimes the cable will break if it is a combination chain and cable drive system.
I released the safety handle but the chain drive is still jammed.
Some problems are associated with the actual installation of the garage door opener.
Do you have a garage door chain that is loose and knocking against a rail.
The cable side is extremely tight the chain side is extremely loose.
The chain on my garage door opener seems to be sagging and rubbing on the track.
Place a level on these and the rail to check to see if they are level.
There are only a few ways that the chain can be tightened.
Having an automatic door opener in your garage is a great convenience but you have to give the opener and all its parts regular.
There may be an adjustment linked to the chain or an adjustment to the length of the door opener track.
Also the garage door slides along two door rails on either side of the garage.
The door rail connector is at the end closest to the door since the door is in the down position.
In this case the cable can be replaced fixing the problem.
If the rail system is not perfectly level the chain can eventually bind up in the process of working the door.
How do i adjust it.
How to fix a chain drive garage door when it won t open.
Garage door chains become slack from everyday use because of the vibrations created by the motor and the weight of the door.
It s important to get this switch at just the right distance from the motor so that the door is able to close all the way but the motor also knows to stop running.
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.
T his is a pretty uncommon problem but one that can happen after you ve first installed your garage door opener.
Garage door is in the down position seems to want to continue to go down since its cable is still tight.
Try making small adjustments.