If the door hits an object when it is closing it will stop and raise back up.
Garage door goes back up when it hits the ground.
Your travel down setting needs to be adjusted.
Possible reasons why your garage door hits the floor then goes back up.
Look for two screws on the motor base.
I also show how to lock the garage door opener to disa.
This is so it won t crush a kid or a person if they happed to be under the garage door when it closes.
This is referred to as grounding.
This issue happens less often than a blocked or off track sensor.
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.
Garage doors have a pressure sensitive mechanism on them for safety reasons.
This is almost always the result of a dirty or obstructed safety feature.
It goes partway down reverses direction and goes back up again.
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.
My garage door hits the ground then goes back up again.
You push the button to close the garage door.
Your concrete floormay have lifted so look at that.
The garage door will automatically go in reverse whenever it hits an obstruction such as the driveway or ground.
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.
In this case the garage door opener detects that it is coming into contact with.
Here s a rundown of some of the possible reasons this can be happening.
As is the case with so many issues at the home there s no one reason why your garage door closes then opens.
There may be another sensor near the motor that tells the unit how far to let the garage door go down.