Garage door doesn't close and then goes back up

We moved into an older house a few months ago. The inspector verified the sensors on the garage door are aligned correctly and that if an obstacle is hit, the door goes back up like it should. It's a Sears screw drive opener.
Recently we've been having a weird problem. The door starts to close and then at various locations it then starts to go back up again as if it hit something. It could be partially closed at various points like 1/2 way down, 3/4 way, 1 foot to go, etc. We have to sit there and keep hitting the button and eventually it will make it all the way closed. This doesn't happen all the time which is what makes it frustrating to figure out what's wrong.
I have checked the sensors and they're aligned fine. I noticed that the sending sensor that is installed on the rail was bouncing a bit when the door got close to the ground so thought maybe that was breaking the beam. I took it off the rail and mounted it on the wall so it's not moving at all now, but the problem is still happening.
It's an older door, probably the original from the early 80's, and the wheels seem to be gliding somewhat smoothly through the rail. The door does shake a bit when opening and closing. Before I call a repair company, is there anything else I can try? Thanks, Jeff
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
check the track alignment, they have to be adjusted from time to time. Notice that the wheel tracks are made of multiple pieces? These do move out of adjustment eventually and have to be realigned so that the rollers have a nice, smooth transition from one track section to the next. If there's a jump between two track sections, or if one side is not level with the other, the door can bind slightly and cause the controller to think something is blocking the door.
The closing force setting can be adjusted too, but I'm not recommending that because that could compromise safety.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
Jeff wrote:

It is obviously binding a bit when closing. Even new doors will do that, especially in cold weather.
When you disconnect from the opener does it close and open easily?
Do you have the instruction book on how to set the closing force? If not you might be able to find it on the web.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
look for the pulleys the cable goes over, the inner bearing of the pulley can wear making opening and closing hard.
I had this problem here and have new pulleys to install on the first warm day
when did you last lube your door?
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
Thanks to everybody for the tips. I do have the opener manual. I haven't lubed the door since we just recently moved in. I'll give all the tips a shot and hopefully one or more of them will solve the problem. Thanks again!
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Site Timeline

HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.