Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+
Posted by Anonymous on
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Posted on Jan 02, 2017
There isn't a reset code. It sounds like you may be having a door sensor problem. Is the small light on each sensor lit and not blinking ever so slightly? Does your door start down and then reverse to the open position? Is the door stuck in the open position? Check to make sure the trolley isn't jammed against the bolt just in front of the motor unit. If it is then remove the bolt and run the door until closes. Then adjust the up limit on the side of the motor unit. Turn it in the opposite direction of the arrow printed on the cover about 3 turns. Be sure to then replace the bolt.
Posted on Jun 04, 2009
Check the door springs. One may be broken. You may have a bad drive gear which is a nylon gear just in front of the motor. Remove the cover and take a look. It will be obvious if it is stripped.
Posted on Nov 15, 2009
Testimonial: "Right on DonO It is a broken spring! Do you have a rough est of repair cost?"
SOURCE: Garage door won't move
download the pdf for the unit that is closest to what you have, go thru the diagnostics.
Hope this helps
Posted on May 29, 2010
Look at the LED light next to theSMART/LEARN button on rear of the motor unit. You may need to removea light lens cover in order to see it. If the light is flashingrapidly this means you have a stuck button on one of your remotecontrols. Take the batteries out of each remote control. When youremove the batteries from the bad remote, the light will stopflashing. This remote needs to be replaced.
If one of your neighbors remotecontrols is inadvertently programmed into your receiver, you doorwill open when their remote is activated. If this happens you willneed to clear out your receiver and reprogram your remote controls.Press and hold the smart/learn button for 6 seconds or until you seethe small LED light near the button turn itself off. If the abovesteps have been followed and the symptoms continue, there may be anelectronic short in either the wall control button or the receiverlogic board. In this case, remove the wall control wires fromterminals 1 and 2 on the motor unit. Should the symptoms persistafter the wires are removed, replace the receiver logic board. If thesymptoms stop with the wall control wires removed from the motorunit, replace the wall control button, and the wires leading to thewall control button.
Posted on Jun 17, 2010
Remove the cover and check the drive gear. It is white nylon and is just in front of the motor. You will find it is stripped. The part number is 41A2817.
Posted on Jan 28, 2011
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