Visually inspect the rollers and their brackets.
Sagging garage door opening.
If you take the garage door measurements to a local lumberyard or hardware store they will be able to help you pick out the proper support beam for your situation.
Using a ladder visually inspect both of the garage door tracks.
If your garage door opener uses a chain drive then it is probably like a lot of other garage doors.
How to fix a sagging garage door step 1.
To correct a sag in your garage door header you will need to reinforce it.
Garage door sagging in middle fixing misaligned tracks.
This is to fix the fatigue and stren.
Over time the drive chain can loosen and create slack.
It could be the case that a strut needs to be installed in order to keep it working as it should.
Make sure you have enough light to work with.
Overall this gives the opener less power to open and close the door.
You can do this.
The tracks keep the garage door rollers in line.
After closer inspection i found a fatigue fracture in the steel.
This opening system is one of the most popular options but it can manifest a problem.