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

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On cool morning door opener wont open either by remote or by the wall switch, however it would work in the evening like nothing is wrong. i checked the outlet and circuit breaker & they are good. i checked the wires on the door opener & to the wall switch also checked the safety sensor and they are good.

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Posted on Sep 07, 2009

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Why wont my 3 remotes (hand held factory in remote)only work to open the door ? They no longer work to open the door.I did replaced the batteries and reprogramed, craftsman 3/4hp chain driven garage d


SOUNDS LIKE SOMEONE MAY HAVE PRESSED THE LOCK / VACATIONS SWITCH ON YOUR WALL CONTROL. IF STILL NOT WORKING AND THE LED IN THE WALL SWITCH IS NOT FLASHING TRY AGAIN TO PROGRAM YOUR REMOTES.

GOOD LUCK

STEVE

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It sounds like a problem with the infrared safety beams, either they are not working, are misaligned (someone might have kicked/bumped into one), or I even had one that didn't work because there was too many cobwebs/dust covering one of the lenses.

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Please state where you are located. I am in UK for instance.

May 28, 2017 | Electrical Supplies

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The remote opener in my far works, but the garage door opened on the wall of my garage will not open the door. What is wrong?


Perhaps the wall opener control needs to be accepted by the opener, press the button on the opener head unit and then press the wall switch. Consider new batteries before you do so.

Mar 04, 2011 | liftmaster Garage Door 1/2 Hp

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No reponse when using the remote, the wall control works fine.


The remotes use a receiver to actuate the door and the wall control does not. It sounds like your logic board is bad. Maybe a lightning storm recently? Try removing the board and look for burnt or missing traces on the printed circuit.

Sep 11, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

On cool mornings door is dead nothing works,remote, wall switcth. checked wires and safety sensor good. door opener will work latter in the day.


Make sure you are getting power from the wall and that it is reaching the opener. Remove the logic board and check for cracks or bad connections on the printed circuit board especially around the small transformer.

Sep 06, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

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.

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The tempatures in the morning have been cool, about 40F and an hour later slightly warmer, maybe 45-50F. Thanks for the suggestion and I am going to have the cale checked for shorts or opens. The opener is direct wired to the breaker, so no outlet is involved. The morning have been cooler since my original post and have not seen the problem again. Maybe its Grimlins? I'll update if anything wrong is found. Thanks!

Nov 01, 2008 | Electrical Supplies

1 Answer

Remote only closes the garage door, will not open it


Anytime a door opens and/or closes randomly or doesn’t work consistently 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 or interfere with the remote signal.

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 / interference 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.

In your case the expansion of the wall in the afternoon may be enough to cause pressure on the wire to increase the problem – works in the morning but not the afternoon.

Also after you change the batteries you need to reprogram the remotes.

HOPE THIS HELPS

Aug 08, 2008 | Sears Craftsman LiftMaster Chamberlain...

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