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

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I have a 1/2 hp sears garage door opener part# 41A5389B and I'm having trouble adjusting the up travel. I can't get the door high enough to get my truck in the garage. When I take the door to the floor it lacks about 4'' opening far enough, if I start closing the door partionly than push the remote again opening the door it opens all the way, any ideas.

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When was the last time the batteries changed?
change the batteies and try again or program another channel,

Posted on Apr 27, 2010

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How do i set the travel limits on my craftsman garage door opener 139.53919

  • Open the garage dooricon1.png fully by pressing the wall control button. The bottom section of the door should be right at the header in the "full open" position. If it is too far back, the door cable can become misaligned. If it is not back far enough, you may not be able to get your vehicle in and out of the garage.

  • 2

    Position a stepladder behind the garage door openericon1.png motor. Locate the limit adjusting screws on the left side of the motor housing. Have a friend stand by the wall control button.

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  • 3

    Insert a screwdriver into the slot for the "up limit" adjustment screw. Turn it to the right to decrease the door travelicon1.png and turn it to the left to increase it. Turn the screw in small increments.

  • 4

    Close the garage door by having your helper push the wall control button. Notice the seal between the door and the floor--there should not be any light coming through. Adjust the "down limit" screw in the same way if necessary.

  • 5

    Operate the door by the pressing the wall button and check your adjustments.

  • Read more: How to Adjust a Craftsman Garage Door Opener '

    Jan 12, 2013 | Sears Craftsman LiftMaster Chamberlain...

    1 Answer

    I have Craftsman ½ HP Garage Door Opener Model 139.18458D. It reopens immediately after closing. Sometimes it works normally, and sometimes gives this problem. I have tried adjusting the close force,...

    It sounds like the door is traveling too far in the down direction. When it hits the floor the safety causes it to reverse to the open position. You need to adjust the 'down limit' not the force.

    Sep 06, 2010 | Sears Craftsman LiftMaster Chamberlain...

    1 Answer

    Craftsman garage door opener #139.53985 The door reverses in the fully closed position. I can not decrease the down travel limit by turning the adjustment screw clockwise. Please comment regarding a...




    Jun 27, 2010 | Sears Craftsman LiftMaster Chamberlain...

    1 Answer

    How can I udjust garage door so that will close all the way down to the floor? Sears 41A43157 ? It came with the house - previous owner had no instruction manual. It was installed in 1993. Otherwise works...

    look for 2 plastic screws, should be white in color. the screw on the left adjusts the down travel. there should be arrows pointing to which way to increase the travel(i think turning left for down). if you only need a few inches to reach the floor you should be able to adjust. if its way off there may not be enough adjustment. 1 full turn will move will door a couple inches so adjust a little at a time or you may overshoot. good luck

    Apr 06, 2010 | Sears Craftsman LiftMaster Chamberlain...

    1 Answer

    The door doesn't move up high enough from the top of the garage opening, I have adjusted to chain nothing seem to work.

    The 'up limit' control is on the side of the motor unit. Turn it in the direction of the arrow printed on the cover. Each full turns is approximately 2 inches of trolley travel.

    Nov 01, 2009 | Sears Craftsman LiftMaster Chamberlain...

    1 Answer

    Garage door is going down too far

    Use a flat blade screw driver to adjust these limits by inserting it in the holes as labeled . Start gradually adjusting and stopping the travel if needed by pushing the open/close control as per usual.

    Aug 02, 2009 | Sears Craftsman LiftMaster Chamberlain...

    1 Answer

    Changed gear box in craftsman garage door opener

    you did not give enough info. If it closes completely and right away goes up, if bulb blinking. if it is, something on door is blocking safety beam. If light is not blinking, DECREASE down travel.

    Jan 15, 2009 | Sears Craftsman LiftMaster Chamberlain...

    2 Answers

    1/2 hp craftsman garage door opener won't open when cold

    I called Sears garage door customer service number due to the same issue. The test is to disengage the opener drive by pulling the emergency disengage handle, then open the door half way manually and then let it go. If it stays there it is a door/track/lub problem; if it drops down and closes its a garage door opener problem. Mine stayed open half way during this test so it was a door/track/lub problem. After using silicone spray on all tracks, rollers, and springs mine has been working great. Good luck.........

    Dec 10, 2008 | Sears Craftsman LiftMaster Chamberlain...

    2 Answers


    Refer to your owners manual to adjust the travel limits to stop the door opening too high

    Apr 30, 2008 | Sears Craftsman LiftMaster Chamberlain...

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