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

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Old Craftsman garage door opener starts to close then opens again

I have very old model Craftsman garage door opener. When I hit the button on both remote and wall the door starts to close then re-opens.

I looked for "sesor lights" as suggested to other persons but I think this model is so old that it did not come with sensors.

How can I fix this?

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Try adding a little more down force

Posted on Jan 15, 2009

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I have a Craftsman opener with security plus (18 months old-blak transmitter button) and the wireless keypad will open the door by simply hitting enter (no code required). I would assume it had to be the...




Opener can be closed by pressing only the ENTER button if the One Button Close feature has been activated. This feature has been activated at the factory. To activate or deactivate this feature press and hold buttons 1 and 9 for 10 seconds. The keypad will blink twice when the One Button Close is activated. The keypad will blink 4 times when One Button Close is deactivated.


Aug 02, 2010 | Sears Craftsman LiftMaster Chamberlain...

2 Answers

My Craftsman garage door opener opens fine. It


It could be closing too far or the sensitivity could be set too sensitive.

Lube the springs, wd-40 rust may be the whole problem.

If the door hits and the opener continues to move until the rail flexes upward and then reverses - probably the travel adjustment.

Does the door close and stay closed if you hold the wall button down constant until it closes? - this would indicate a safety eye problem.

If the door reverses before it hits the floor or just as it hits the floor it could be the sensitivity or if the safety eyes are mounted to the track they could be flexing enough to move the eyes out of alignment.

Hope this helps.


Jul 11, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage door only raises about two inches then stops.


Check the door springs and also remove the cover from the motor unit and check the drive gear. The door spring could be broken or the drive gear may be stripped.

The sensors only work when the door is closing.

Jun 15, 2010 | Sears Craftsman LiftMaster Chamberlain...

2 Answers

Craftsman new 315MHz Garage door remote programming with old openers


The radio frequency has been changed so the two are not compatible.

Jun 01, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

6 month old 139.53985dm garage door opener shuts off going down


Unplug unit at power source and check and tighten all connections in the control box. And try this link.

http://www.garagedooropeners.us/technical_information.html

Mike

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

1 Answer

My craftsman garage door is about 8 years old. It


Make a slight adjustment to the Upward force on the side of the machine. Turn the screw a 1/4 turn each time and test, see if that helps. Also, make sure there are no obstructions or friction when the door opens and closes. Try it manually first.

Feb 18, 2009 | Sears Craftsman LiftMaster Chamberlain...

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