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

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My door comes down part way and the motor keeps running.

I have a Craftsman Sears door and when I push either the remote or the pad on the wall, the door come down partially. When the door starts to come down the motor keeps running but the chain doesn't move the door.

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  • 98 Answers

Sounds like the gears might be out of the operator. If you can remove the cover see if there are white shavings in the cover. A Craftsman operator will take gear kit # 41C4220A

Posted on Jan 03, 2009

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Sears craftsman 1/2 hp. Door goes up with remote, but when button pushed to go down the light flashes and door doesn't move. If you push the wall mounted switch, the door goes down like normal. Works...


Check the sensors in the doorway. They should both have a small light that is lit and not flickering. Tweak them a little. If you cannot get both lights to come on you have bad sensors.

Sep 07, 2011 | Sears Craftsman LiftMaster Chamberlain...

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We have a craftsman garage door opener. Recently all remotes including the key pad began working inconsistently. Even the hard wired button on the wall is finicky. The door will open a little and then...


First thing I would do is remove the cover from the motor unit and check the drive gear. It is a white nylon gear just in front of the motor. It will be very obvious if it is going bad. The part number is 41A2817 and is available from Sears or any good door opener service company. It will come with instructions.

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When I push the button it only runs for 1 sec and stops...even with the door manually removed from the track system..I have a craftsman 139.53603 opener.


my craftsman garage door open about one ft and stop when i try to push the wall button or the remote pad it completely stop working

Oct 22, 2009 | Sears Craftsman LiftMaster Chamberlain...

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On the rear of your motor unit near where all those white wires go you will find the smart/learn button. Hold the button down on your remote and press and immediately release the smart/learn button. Do this with all your remotes.

Sep 28, 2009 | Sears Craftsman LiftMaster Chamberlain...

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Craftsman Garage Door Opener won't work after storm


Check to see if the trolley (the part that slides back and forth on the rail and is connected to the door) is jammed against the bolt just in front of the motor unit. If so, remove the bolt and run the door until it is closed. On the side of the motor unit there is an 'up limit' control. Turn this 3 turns in the opposite direction of the arrow printed on the cover. Be sure to replace the bolt.

Jun 16, 2009 | Sears Craftsman LiftMaster Chamberlain...

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GARAGE DOOR OPENS AND CLOSES ON OWN LT BLINKS SEVERAL TIMES


Anytime a door opens and/or closes by itself I look for a smashed wire between the motor unit and the wall button.

If the wire is smashed the insulation becomes so thin that power will leak thru the insulation and activate the door.

Loosen the staples with a small screwdriver and slide the wire about ½ inch to move any areas of thin insulation away from the staples.

The second thing would be a bad wall button or a remote with a sticking button.
Or a remote in someone’s purse that gets the button pushed by other stuff in the purse.

The test is to disconnect the push button wires at the power unit. If the self operation stops you have located the problem. If you reconnect the wires and disconnect the wire at the wall button this will tell you if the problem is the wire or the button.

This can also interfere with remote controls

HOPE THIS HELPS

Mar 12, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

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First, check the safety eyes. There should be a light on on each eye. If not realign until they come on. On the wall button if the green light is blinking press the lock button on the wall control for three seconds. The light will go solid. If either of these do not fix respond with more detail and I will help.

Feb 24, 2009 | Sears Craftsman LiftMaster Chamberlain...

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Garage door opened, won't close


If you can press and hold the wall button and the door will go down, you have a photo eye issue. Check the photo eyes at the bottom of the door.

Jan 16, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

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You can turn up the up and down force on the motor head to give the unit more power. During colder weather the unit needs more power. Afterward do a 2x4 safety reversal test. thanks, BB

Sep 14, 2008 | Sears Craftsman LiftMaster Chamberlain...

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