This is almost always the result of a dirty or obstructed safety feature.
Garage door get to bottom and goes back up.
You push the button to close the garage door.
Eventually the pressure sensor on the bottom of the door mistakes the ground for an obstruction and goes back up.
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.
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 garage door does not close completely or begins to close and then opens back up again the down limit switch needs to be adjusted.
Here s a rundown of some of the possible reasons this can be happening.
Your garage door sensor works by having two photo sensitive devices on either side of the garage door.
Your travel down setting needs to be adjusted.
Try one of these troubleshooting strategies to put a stop to this maddening problem.
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.
Many times the malfunction can be due to a loose connection or broken wire.
It goes partway down reverses direction and goes back up again.
The rubber on the bottom of the door should touch the ground but should not be smashed.
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.
How many times have you waited for the garage door to close only to have it go back up once it reaches the bottom.
The best way to fix it is to adjust the stop time on the closer so that the motor does not lower the door so far.
Since the lack of power supply is a common problem check the wires around the sensor when the led lights are not flashing.
Measure the distance of the gap from the bottom of the.