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

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Sensors don't function, placed eye to eye the down will not work. Checked the connections, ok. The lights on the sensors do not work, is this a circuit board problem?

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Yes you have a bad logic board.

Posted on Jul 16, 2009

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Srs light on dashboard


There are a number of reasons the SRS light will come on for. Most commonly they are Impact Sensors, Clockspring, and Airbag Module. I don't know what sensors you replaced or what code is showing up, but you may have another bad sensor. This does happen. More likely than that is a bad connection at these sensors. Take them apart and clean all terminals. Make sure they are making good clean contact. Also check for a broken or nicked wire in the area.

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My garage door opens fine by pushing the button once, but won't close unless I hold the button down through the whole down motion.


The problem is with your safety "eyes" on your system. I bet the lights on the opener click rapidly once in awhile as well. Make sure that both lights on safety "eyes" sensors are on (one of them is amber and the other is green). If not, check the wiring onto the opener - white wire should go to white and gray to gray. This system will not operate properly if it cannot sense the proper functioning of the safety "eyes" sensors.

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Craftsman GDO reverses itself when the door reaches the eyes


The only thing that will cause the main light to blink 10 times is a sensor problem. Sometimes the sensors will be misaligned just enough to turn the light on but will not work properly. If you look really close (on your knees) you can see the receiving sensor blinking ever so slightly. Tweak the sensors until the light glows constant.

Jun 26, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Can't close my garage door Mine will go down if I hold the wall button until it is all the way down, but it goes right back up. i removed the cob webs and checked the sensors. is there suppose to be a...


HOLDING DOWN THE WALL BUTTON OVERRIDES THE SAFETY EYES.
WHEN HOLDING IT DOWN MAKES THE DOOR CLOSE PROPERLY THE PROBLEM IS IN THE SAFETY EYES.

THERE ARE LED'S THEY SHOULD BOTH BE LIT - CHECK FOR A LOOSE OR BROKEN WIRE.
ARE THE EYES WIRED CORRECTLY?
ARE THEY AIMED AT EACH OTHER?

IF ALL ELSE FAILS GET SOME DOORBELL WIRE AND BYPASS THE EXISTING WIRES AS A TEST - BE SURE TO CHECK THE POLARITY & LOOSE CONNECTIONS.

HOPE THIS HELPS

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1 Answer

We have 2 sensors. 1 has a green light and the other has no light


Your safety eyes are out of ajustment. Make sure that the eyes are pointing directly at each other. A light will come on on each eye when they are properly aligned. The only other thing that could be wrong is that one of the safety eyes could be bad, and the only thing you can do is replace the eyes. 99% of the time the problem is an alignment issue. By holding down the wall button, you are overriding the safety eyes.

Mar 05, 2009 | Sears Craftsman LiftMaster Chamberlain...

5 Answers

Programing limits on a Grifco MK3 Garage door Operator


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.

Nov 21, 2008 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

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stop adjusting. you are doing right thing. unit will not run down w/o eyes so removing wiring did nothing. you gave clue when yu said they were folloded. buy new set of eyes.

Oct 04, 2008 | Sears Craftsman LiftMaster Chamberlain...

2 Answers

Craftsman Garage Opener /


door will not go down unless you hold down the inside botton.

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

1 Answer

Sears/chaimberlin opener does not operate


IF YOU HOLD DOWN THE WALL BUTTON IT OVERRIDES THE SENSORS.
IF IT WORKS WHEN HOLDING DOWN THE BUTTON - THE PROBLEM IS IN THE EYES SOMEWHERE.

HOPE THIS HELPS

Aug 24, 2008 | Sears Craftsman LiftMaster Chamberlain...

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