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

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When i press the key only the chains move leaving the door still up

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Sounds like the trolley has been released from the door. Pull straight down on the release rope and let go. When the two halves of the trolley are lined up they should catch and the door will work.

Posted on Aug 07, 2010

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Reset alarm


I can only suggest one thing that might work.

Disconnect the battery and leave the car overnight. In the morning put the key in the ignition and turn it to the on position and then connect the battery.

If that doesn't work you will need the services of an auto locksmith or the dealer. I hope the price you paid for the car was much reduced because of the missing keychain.

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Does anyone have a solution to fix my driver door locking mechanism? When I press the key fob to unlock the car doors. All the car doors unlock except for the driver door. However if you open the driver...


General advise:The lock is not ok.The same wires that lock the doors,unlock it.Before removing the lock:ceck fuses,door wiring link (near the door hinges)U may have to figure out the link covered in removabile rubber(it has a lock pin and must pull down in some cars rotate)U can clean it by air gun and contact cleaner.Rare:The door unlock pin (small plastic knob that u unlock manually from inside)has the rod dirty/stucked/twisted,ceck it to move loose.Also spray chain lube and wd40 anywhere in the lock u gain acces (the key hole,from sides,from the pin lock).U can see if it is stucked if the unlock knob has the intention to rise (small moves) but does not pop.Cheers.

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1 Answer

I can move the chain freely by hand but when I hit


Sounds like you are in need of replacement gears. It is like the transmission going out in your car. I would leave this to a pro but if you want to do it parts can be found at genie.com or overheaddoor.com. Thanks BB

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My 20 yr. old Craftsman 1/2HP chain drive GDO (139.18590) will click and hum for a second but the door doesn't move when I press a remote or wall console. The door moves freely manually and I checked the...


If your door is stuck in the open position the trolley is most likely jammed against the bolt just in front of the motor unit. You should be able to loosen the chain enough that it releases the pressure on the trolley and then close the door. While the door is closed, locate the 'up limit' control which is on the side of the motor unit. Turn this control 2 full turns in the opposite direction of the arrow printed on the cover and then tighten the chain.

Feb 21, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage door opens all the way only closes half way down


Hi,
Some of your comments look like they're missing but from what I can see you had to put chain back on and now the door doesn't close all the way.take the cover off and look at the limit switch,this the travel adjustment. The switch for the close side is making contact too soon so it shuts off early.You need to adjust contacts so its further away. Depending on where the trolley was when you reattached the chain, you might not be able to adjust it back enough.But try it first. If you still come up short you will have to take the chain back off and move the trolley back to where the door would be closed and reattach chain. now open position will probably need adjustment leave door unhooked and just let trolley move in case it over shoots the mark either way.

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1 Answer

Setting memory seats on 1997 grand cherokee with key fob


I had the same problem and had to kinda figure it out on my own. I have a 98 grand cherokee and I think they should be the same. Inside the drivers door panel there are 3 buttons... a number 1 and number 2 and a SET button. Hold down the set button for a couple seconds then release. Then adjust your settings on your seat and mirrors to what you want...Then press # 1. If you have another person that will be driving the car do the same and press number 2...

The thing is...........There are 2 key chain things issued with each car...One will be the number 1 driver, the other one is the number 2 driver...So...I would program the number 1 driver first and see which key chain thing works...then you will know the other one will be for the number 2 driver.

Hope that made sense...It is a great feature once you finally figure it out. Sheri

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1 Answer

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with the door down, disconnect with the emergency release, see if the motor operates
with no load...if the the track moves you probably have something obstructing the door
ie; a broken spring, door locks, etc ... the chain should be adjusted for just a little
**** mid way down the rail (1/4") if it still doesn't move ... call sears.

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could be a partially broken wire in the wiring harness that runs in the door track. the wires are inside what looks like a plastic chain that allows it to move with the door and have seen them partially break not allowing power to flow the whole time

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1 Answer

Door opener will not engage as mechanism moves along the chain track


Make sure the rope hanging down has not been pulled. If it has the door has been disengaged from the opener. You can correct this by flipping the metal part up (that the rope is connectd to) toward the drive track. Then open or close the door using the remote. The track should grab the door again.

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