If this is set too short your garage door may not shut all the way or it may slam hard on the ground and go back up.
Garage door goes back up when it hits the ground.
This is referred to as grounding.
When i use the remote or wall button to close my garage door as soon as it hits the ground it goes right back up.
This is almost always the result of a dirty or obstructed safety feature.
Your concrete floormay have lifted so look at that.
In this case the garage door opener detects that it is coming into contact with.
I also show how to lock the garage door opener to disa.
Look for two screws on the motor base.
What is probably causing your problem is that the switch that gets tripped when your garage door closes is too far forward allowing it to hit the ground before it trips the switch to stop the garage door.
My garage door hits the ground then goes back up again.
The garage door will automatically go in reverse whenever it hits an obstruction such as the driveway or ground.
This issue happens less often than a blocked or off track sensor.
If the door hits an object when it is closing it will stop and raise back up.
Garage doors have a pressure sensitive mechanism on them for safety reasons.
It goes partway down reverses direction and goes back up again.
In this video i show in detail how to get your garage to stay shut if it continues to bounce back up.
To get it to stay down once it hits the ground i push the button on the remote again and it stays down.
If it looks like your motor is forcing the door into the ground and going back up again then there are a few reasons that his might be happening.
Your travel down setting needs to be adjusted.
There may be another sensor near the motor that tells the unit how far to let the garage door go down.
Here s a rundown of some of the possible reasons this can be happening.
You push the button to close the garage door.