The easiest fix is to remove your middle hinge pin and put a slight bend in it.
How to fix a garage door that opens by itself.
When i say slight that means a barely noticeable bend.
Tap the screwdriver with the hammer until the pin pops up from the hinge and can be removed by hand.
Examine the garage door opener button.
The button can easily get dirty and stuck in the pushed position.
Slide a shim between the jamb and the door on the opposite side of the hinges near the top.
Realigning the beams will resolve the problem.
Remove the pin by placing a screwdriver under the middle hinge.
They can help you get everything back in place and ensure your garage door is working smoothly again.
Check the remote opener.
The door operator button is similar to a door bell.
To troubleshoot the garage door opener button make sure it s clean and free of debris.
It can seem quite ghostly having your garage door operate with a mind of its own.
Close the door and stand on the side where the hinges are visible.
It all depends on the configuration but you likely have a button that activates the door operator.
We all have these kinds of doors you open it and it swings itself mostly shut.
As a result it automatically reopens the door.
But one of the more perplexing issues is when the door goes up and down by itself with no help from you.
When the two sensor housings are out of alignment the beam is cut off which the door opener interprets as an object in the way of the door s descent.
Or you close it to within an inch of the frame and it swings itself open.
If the remote opener is dirty or the batteries are failing it may cause the door to open on its own.
Automatic garage door openers are prone to a variety of problems most of which are fairly easy to fix with routine troubleshooting and maintenance.