Incorrectly set limit switches may prevent your garage door from closing completely or opening all the way.
Why a garage door kicks back up after closing.
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.
Your travel down setting needs to be adjusted.
Your garage door sensor works by having two photo sensitive devices on either side of the garage door.
You will find that the door will only move an inch or so in the close direction and reverse.
In garage door operators made after 1993 there are required safety features that open the door during the close cycle when they detect something blocking the door.
The problem is either due to a blocked path between the sensors dirty eyes loose wires at the sensors or at the motor head or just bad sensors.
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 your garage door shakes when opening or closing or sounds like it is going to fall off the track the problem is most often the pulleys.
The transmitters remotes will not work to close the garage door.
Here s a rundown of some of the possible reasons this can be happening.
Look at the photo eyes themselves if there are cobwebs or if there is dust on the lenses the eyes will sense this and cause the door reverse.
You push the button to close the garage door.
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.
There are two types of pulleys.
Press fit pulleys and cast iron pulleys.
Sometimes there could be a box or a garbage can sitting too close to the eyes.
This is almost always the result of a dirty or obstructed safety feature.
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.
Other times it may be a leaf hanging from the bottom of your garage door.
It goes partway down reverses direction and goes back up again.
Your door opener is traveling too far then sensing it hit the ground and reversing before it is supposed to shut off via the down limit of the three knobs turn the closed in the opposite direction the arrow is pointing i think it is counter clockwise to reduce how far the door travels.