Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+

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Door hard to close have starts to close stops and starts to open again have to keep stopping and reversing door mult times to get closed

  • Garage Door Opener
  • Model# 13953635SRT
    I have the above door with the safety beams. The date of manf. is 1994. works for the most part fine, but lately we have to keep pressing opener to get closed and the sesor beems are not interupted. I even cleaned the lenses. So basically what is happening is that the door starts to close and then stops and reverses as if the beam was broken. I have to catch it with opener and reverse to closing again and it starts closing then catches again and keep this up till finally get down. Sometimes it happens at 3 or 4 spots and sometimes less. I don't have a manual as it was in when i bought the house. Is there a programing issue or something and where if anywhere is this manual available on line. Please help in anyone has any ideas. Hoping this is small fix.

    Thanks Titus
  • Posted by on

    • I try Apr 25, 2008

      I have exactly the same problem . I tried adjusting the two side screws for tension to no avail.

    • Anonymous Apr 25, 2008

      I have the same problem and am now going tocheck all the wiring. It seems the electrical circut must be breaking as it works then stops then works for a day or two then does it again. If I knew what was wrong I would replace the entire thing. I called a door company who came out an said it was the springsw which cost me $700. The thing was that the power went out just before they came and back on after they left with the same problem. So if anyone knows the answer please let us know before some outfit replaces my garage.



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    • 589 Answers

    There should be two small white adjustment knobs on the side of the unit that you turn with a small flathead screwdriver. These are the load / limit adjusters.

    What it happening is it think there is something stuck under the door (like a car hood, etc)

    These adjustments are VERY sensitive, so be patient while adjusting them.

    Posted on Feb 11, 2008


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