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

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My problem is similar to the one above. My opener with lift the door, but when it comes to a stop in the "up" position the lights blinks and there is a clicking sound and I can't get the door down unless I hold the garage button down.

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Check your door sensors. Make sure they are pointed at one another and the small light on each one is lit and not flickering. Tweak them a bit. If you cannot get both lights to come on you have bad sensors.

Posted on Dec 29, 2010

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Posted on Jan 02, 2017

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Dome light, which is actually above the back seat, will not light in the "door" setting. It does work, (both bulbs lit), in the "on" position. Help--my wife is on me about this!!!


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Nov 09, 2010 | Sears Craftsman LiftMaster Chamberlain...

3 Answers

My liftmaster garage door only opens 8 inches and then stops


It sounds like the opener is stopping because the weight of the door is tripping the lift sensor on the opener. There are two screws on the side of the opener to adjust the lift and close pressure. Find the lift pressure screw and ajust it higher to see if that remedies the problem.
Also, because you said the door will not stay open at the top when you open it manually, I think your springs are not adjusted correctly. They should hold the door open in the up position when not connected to the door opener. That may be the reason the opener lift pressure is kicking it out.
If you have to adjust the springs, be careful that you know what you are doing. There is a lot of potential for getting hurt if you don't know the proper proceedure.
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Professional job. Don't forget to take the condensor with the motor.
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http://www.chamberlain-diy.com/doityourself/pdfdocs/114A2184.pdf
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Great call Marty! I had noticed the amber LED above the learn button was blinking with one pulse, which the troubleshooting guide noted as being a problem with the sensors. Finding that one tiny paragraph in the manual and following the instructions of holding the wall-control light button in for 10 seconds reprogrammed it and the functionality is returned. Thanks!

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