Look at the top hinge on the door.
Garage door begins to go down then back up.
Another common cause of garage doors acting this way is a faulty rpm sensor.
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When the opener is activated the screw rotates causing the nut to move until it reaches the switch.
There may be two nuts on one track.
Richard small engine technician replied 8 years ago.
Parts can be purchased in online stores or directly from the manufacturer.
If the door had hit a stop it would not have reversed.
Yes it goes all the way down the track when the door is disconnected.
Your garage door sensor works by having two photo sensitive devices on either side of the garage door.
You push the button to close the garage door.
See if you can find a manual online and go throught the setup steps again.
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.
Then you have a binding problem in the door.
When the opener reverses the screw turns the opposite way and the nut travels back.
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.
If the door hits something hard it will reverse.
Your travel down setting needs to be adjusted.
Here s a rundown of some of the possible reasons this can be happening.
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.
Consult your owners manual or a trained garage door technician in replacing the rpm sensor.
One for the opening limit and one for the closing limit.
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.
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.
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.
A careless or rushed parking job can cause the car s bumper to block the sensor.
This is almost always the result of a dirty or obstructed safety feature.
It goes partway down reverses direction and goes back up again.