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.
Garage door begins to go down then back up.
You might consider calling a local garage door company to come and debug it for you.
It goes partway down reverses direction and goes back up again.
If the door hits something hard it will reverse.
Then you have a binding problem in the door.
Adjust it if needed and make sure the door is positioned in the middle of the 2 tracks.
Possible reasons why your garage door hits the floor then goes back up as is the case with so many issues at the home there s no one reason why your garage door closes then opens.
Look at the top hinge on the door.
If the door reverses and the lights blink 10 times there s still a problem with the sensors or something tripped them on the way down.
Your garage door sensor works by having two photo sensitive devices on either side of the garage door.
Check all of you conenctions and the installation of the new logic board.
Consult your owners manual or a trained garage door technician in replacing the rpm sensor.
There may be two nuts on one track.
One for the opening limit and one for the closing limit.
You push the button to close the garage door.
See if you can find a manual online and go throught the setup steps again.
If the door had hit a stop it would not have reversed.
When the opener reverses the screw turns the opposite way and the nut travels back.
When the opener is activated the screw rotates causing the nut to move until it reaches the switch.
This is almost always the result of a dirty or obstructed safety feature.
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 these can t see each other when the door is almost shut it will send a signal to the garage door motor to open back up.
Yes it goes all the way down the track when the door is disconnected.
Another common cause of garage doors acting this way is a faulty rpm sensor.
Here s a rundown of some of the possible reasons this can be happening.
Richard small engine technician replied 8 years ago.
Parts can be purchased in online stores or directly from the manufacturer.
Sometimes the sensors will be in alignment and just as the door gets close to being shut it will vibrate enough to push one sensor off.