I have a Sears Craftsman garage door opener and sometimes as you push the button to close the door will start to close then right away go back up. No it's not anything in the electronic eye indicating that something is in the way. It just does this once in awhile. Sometimes after a dozen attempts to try to close it, it will then finally go down. It's like it has a mind of it's own. I should not have to adjust any sensor as it does work most of the time. But it is very annoying when it does happen.|||It sounds like it might be binding a bit. When was the last time it was lubricated? The Door Opener has a Torque setting that will cause the door to reopen, when closing, if it is binding.
I would say that either the setting is too tight or you may need to lubricate the drive mechanism or the door wheels.
Get some spray lubricant of some sort, silicone based would be good, and spray the center of each Wheel located on the sides of the Garage door. Then spray the length of the chain or screw depending upon which type of opener you have. If that does not work it is probably the Torque setting and I am unable to tell you how to adjust that without seeing your manual. It should be some screw adjustments on the side or back of your opener. One will be for Opening and the other for Closing. Adjust the Closing.
If it is a Chain Drive the Chain may have streched and need to be tightened. This happens with age.
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