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

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Lift master 1265lm 1993

At random door dont close. some times door moves 4 inches,or goes half way then revirses,cupple times stops 6 inches from the bottom. if open and close door about 3-4 times motor overheats. i checked door sencors cleand eys and green lights are lit. i adjusted the force down and same problem. i checked the door rolers (ok) manule open door and close operats ok. im thinking it is something in the opener. the green light flashes 4 times when door reverses,5 times when overheated. any thouts will be good steve

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  • dangby Sep 05, 2008

    I think the green light flashing 4 times means something. Mine does the same thing. When it is in this error state, it also fails to turn on the lights for about thirty seconds (they stay off while it is opening), and then they come on after about a half minute.

  • Anonymous Mar 13, 2014

    also original door belltype wired button openand close door

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I have had the same problem.  The nylon gear that drives the chain started to strip, and was slipping. It finally wore out completely, and now needs replacement.

Posted on Dec 17, 2008

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Check and see if a spring is broke on either side above the door in the middle. (big springs) that's my problem.

Posted on Nov 26, 2008

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Hi Rick

I believe best and safest solutions is resetting and re-programming the system. here is the instruction manual link;
http://www.hooverfence.com/catalog/entry_systems/lift_master/976lm-manual.pdf

Also you can call the hotline (1-800-528-2817) of the manufacturer for the step by step reset and re-program the system


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