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

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Cold weather came in and now the garage door closes about 6 inches then goes back up. I have sprayed penetrant on all moving parts and the door closes fine manually. It is minus 30 degrees celcius outside but not nearly that cold in the garage which is insulated but not heated.

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Try increasing the 'down force'. You will find the control on the rear of the motor unit near where all those white wires go. Increase it about 1/4 turn and try.

Posted on Dec 14, 2009

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Garage door opens about 4 inches, stops, then goes back down. No flashing lights at all. One sensor light is green, the other is a steady yellow. What's the issue?


something may be obstructing the door, so pull the red emergency release handle and try to pull the door manually.if you cant move it manually, call for professional help

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if there are no obstructions, manually set the adjustment controls on the back side of the opener panel. weather can sometimes change the amount of force needed to open/close. adjust the setting with a screwdriver to no more than 260 degrees, about 3/4 of a turn

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Have a Chamberlain liftmaster professional 1/2 horsepower garage door opener that is only opening 6-12 inches and then stops. Just started in cold weather. If I keep retrying it, the door will eventually...


if you can open door Manually- find the FORCE adjustments-Not Travel. These might be "blue" in color. Increase the UP slightly. this adjustment in the cold weather is due to door hardware dry, lube rollers/hinges with wd-40 while door is down, lube every 30 days, keeps it moving quietly...

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1 Answer

Same as this from syaremko Cold weather came in and now the garage door closes about 6 inches then goes back up.....It is minus 30 degrees celcius outside but not nearly that cold in the garage which is...


Try increasing the 'down force'. You will find the control on the rear of the motor unit near where all those white wires go. Increase it about 1/4 turn and try.

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1 Answer

Garage door opener will not close in cold weather


The are two knobs on the back of the opener. They are force settings. One is the upforce and the other is downforce. Turn both knobs to "5" and try. This should take care of the problem. They come from the factory at 1 or 2 and when it gets cold it takes a little more force to cloce the door.

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1 Answer

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iv had a few people come in with that complaint I clean inside of door and spray seal with good 100% silicone spray and spray latches with penetrating oil

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1 Answer

When cold outside, door only opens a few inches


1.Check to see if the door is running correctly. 
  A. Run the door down and pull the emergency release. See if the door will run easily by itself. 

  1. If it runs hard by hand try lubricating the rollers and hinges with silicone spray or some form of lubricant (not WD 40) 

  2. If the door is heavy and falls back to the ground, you probably have a spring issue (either broken or needs more tension) in this case call a professional door repair company in your area.

  B. If the door runs fine then check the up force on your operator (the box that hangs from the ceiling and reads Craftsman). If the light(s) on your operator go from front and/or back, the force adjustment screw is on the back of the operator. If the lights are on the sides of the operator then the force adjustment screw is on the right side (looking from the back of the operator and facing the garage door). Turn the light blue adjustment screw with the up arrow to a higher number.

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I can't believe it! My opener works fine a 10 degrees and above but below 10 degrees it would go down a little ways stop and go back with the light flashing. I checked the electric eye and found it would go out of alignment when the temp drop. Who knew!
I made the adjustment and it now works fine.

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