We will now want to take a look at the garage door springs.
My garage door will only open a few inches.
You will have to call a professional garage door service tech.
I would encourage you to test the mechanism of the door itself to completely rule out any damage or blockages.
If the door starts to open but won t move more than a few inches the torsion spring may be broken.
If this isn t lit check for a tripped breaker in the main panel or a tripped gfci outlet.
Disconnect the opener from the door itself like so and open it manually a few times.
My garage door opens about six inches and stops i press the my garage door opens about six inches and stops i press the button twice so it will stop going down and then is goes up another 6 inches or so.
Most garage doors from the past 15 20 years have a photo eye which detects if a person or object is blocking the door from lowering all the way.
A broken torsion spring will also cause the door to slam closed instead of closing gently.
In order to fix this you ll want to make small changes to the close limit setting until the door opener knows to stop once the door has reached the floor.
This indicates that the springs torsion springs in the case of the photo above are working properly and are not the issue.
If the door is working properly it should be easy to lift by hand.
This read more.
The photo eye will be about 4 6 inches off of the ground for most doors with an eye that is about the size of a pea.
If your garage door is closing fully and then reversing to open again then it may be due to a problem with the close limit switch.
If the door does not open manually.