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

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Wont open or close/lite flashes and clicks.

Acting like something in way of eye sensors safety feature, but they are clear of obstructions.
Also remote doesnt work even with new battery.

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Two problems. recode your remote control. are led lights on both sensors. clean lenses. aim at each other. should cure.

Posted on Jan 15, 2009

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Garage door opener


most likely you have a loose connection, a shorted wire or a broken wire in your sensor control wiring(the electric eye safety system). the override for that is hold down the wall button-which you are using. so most likely that is the issue

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You may actually have a problem with the sensor on the garage door. If none of the remotes aren't responding after getting new batteries for them, you may just have to take the sensor in. You could also check and see if the outside remote has any wiring issues, but I honestly think that there is a problem with the sensor and not your remotes. Top Quality Garage Doors At DSI Door Services North Shore

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I'm having to hold the main remote button down continuously to get the door to close. It acts like something is obstructing the path, but it's clear. The sensors have a green light on one and a...


You need to hook those wires back up and then check the door sensors very closely. If the light in one of the door sensors is dim or flashing it will cause your problem.

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The garage Remote control was working normally at first then for now reason now it just opens the garage door but doesn't close it. I checked the side sensors they look OK & clear, and I...


It could be the garage door motor that is acting up. Try closing it with the button in the garage. If that's not the case, you may need a different garage door opener.

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1 Answer

Door will not operate unless you hold down button


I am presuming the following: is it that the door will not operate unless you hold down the button to "close the door"? And the button you are pressing is the hardwired wall button or control inside the garage correct? And if you try to close the garage door with the remote the overhead lights flash off and on or the motor make a clicking sound (about 5 clicks?)
The problem is either an obstruction of the safety sensors at the bottom of the door or, one or both sensor eyes are out of alignment. If you look closely at both safety sensor eyes on the part that faces into the garage, you should see a glowing LED. One side will be an Amber color and the other Green. If one is lit (amber) but the other is not (green), that is an indication that the beam is not being received by the receiving eye (amber).
If there is no obvious obstruction (check for spider webs, dust, try cleaning the clear lenses facing each other, etc,) Try re-aligning the sensors. When they are properly aligned the Green LED will be lit. Now, check the motor for operation.
If you have difficulty getting the transmitter eye (green LED) to light, try closing the door at the wall button, then, pull the red emergency release handle to disengage the door.
Now, try operating the motor unit with the door disconnected while using the hand held transmitter. If the motor unit operates to the close position while the door is closed but not when opened, then that sounds like there is sufficient light entering the garage to "Wash" the transmitter beam out so the receiving eye does not get it.
Contact Chamberlain/Liftmaster for Sensor eye blinder shields that can be easily installed by you. (they just snap on) If neither LED is lit, make sure that the wire to the sensor(s) has not been cut off at the sensor itself. If that checks out, check the connection at the logic board. Make sure that both wires are securely connected.
If after checking all of that, and you do not have either of the LEDs on, then disconnect the safety sensor wires from the motor unit's logic board. Then take a 2" piece of bell wire and jump it across the two terminals for the safety sensors. If the unit operates normally when using the hand held transmitter, then the problem is likely: a) Bad safety sensors b) Broken wire to one or both sensors
To check if the safety sensors are good:
Remove both sensors from their mounting brackets. measure about 8" to 12" of wire from the back of the sensors and cut. You should have about 8 - 12 inches of wire on each. Now, separate and strip the insulation from each and then match the white striped wires and twist them together, and do the same with the solid non-striped wires. Take the sensors up to the motor head and connect the spliced wires to their respective positions on the logic board. Now, Point the two sensors directly at each other (its okay if the clear lens part are touching each other) Check if both LEDS are now lit. 1) If YES; then the sensors are good, the wire to them is broken somewhere; [FIX] replace the wires for both sides. 2) If NO: then the safety sensors need to be replaced. [FIX] Replace the sensors, contact Chamberlain / Liftmaster for replacement parts. You will need your garage door opener's model # which can be found under the light bulb or light fixture on the opposite side of the logic board. Having the model # speeds up the parts search for you.
I hope this helps you out. [I have been factory trained on residential and commercial garage door openers by Chamberlain / Liftmaster and have been providing installation and tech support on them for over five years. Prior to that I used to install and repair these units, and I've done that for nearly seven years.]

May 18, 2011 | Chamberlain & Liftmaster Garage Doors

1 Answer

Garage door won't close with remote and I have to hold the pad to make it go down, however it opens just fine.


Your safety reversing sensors must be connected and aligned correctly before the garage door opener will close. An obstruction in the path of the sensor will also cause your door to not close.

This sensor is an electronic beam, which is sent between two sending and receiving "eyes". These eyes face each other and are located just inside your garage door. They may need to be adjusted so the beam from the sending eye is properly detected by the receiving eye. Once the receiving eye "sees" the beam from the sending eye, a green indicator light will glow on the top of the eye. Tweak them a bit. If both lights do not come on you have bad sensors.

Sep 24, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Door starts to open/close only travels 8" then reverses/stops


The problem is most likely with the safety "eyes" sensors. Your system does not see them. Rather than opening even without sensing the safety "eyes" sensors like most older system do, this model apparently has a safety feature built in, that without proper communication between the safety "eyes" sensors and the main console, the door will not operate at all. Some people had reported that in a situations like yours, if they the button on the remote pressed, the door will open/close, though this is not recommended.

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1 Answer

1/2 HHP lift master. the motor acts like something is in the way


I am assuming the door wont close.

Your safety reversing sensors must be connected and aligned correctly before the garage door opener will close. An obstruction in the path of the sensor will also cause your door to not close.
This sensor is an electronic beam, which is sent between two sending and receiving “eyes”. These eyes face each other and are located just inside your garage door. They may need to be adjusted so the beam from the sending eye is properly detected by the receiving eye. Once the receiving eye “sees” the beam from the sending eye, a green indicator light will glow on the top of the eye.

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What does a normal remote do with the lights?
Is yellow and green normal?

Aug 03, 2009 | Sears Craftsman LiftMaster Chamberlain...

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It has the "Protector System" (safety sensors). chec the sensor indicator light on the receivinng eye the green light had a slight flicker.cleaned both the sending eye and receiving eye lens of dust and cob webs, then realigned the receiving sensor for a steady green indicator light. then check the door function it now works fine.over time, temperature, and viberation the sensors become dirty and get out of alignment, as no one had tampered with the sensor alignment prior to this. Hope this works for you.

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