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

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Our garage door will not shut unless you hold the switch down. If you release the switch the garage door will open. Any suggestions?

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  • ezmerelda Jul 04, 2008

    what color are the sensors supposed to be? i've got one green and one orange

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Check the photo sensors at the bottom of the garage door tracks, and make sure each sensor can 'see' each other. Normally theres LED lights on them to let you know they are aligned. Both LEDs should be on and not blinking.

Posted on Jul 02, 2008

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Garage door openers


Clean the chain rail with a solvent that can remove old lubricant. Re lube with Lithium based lubricant that does not "harden" when the temperature drops - other types of lubricant tend to "harden" with lower temperature that strains the movement of the door. Clean excessive lubricant from the rail as it can drip onto your vehicle.

Jan 19, 2014 | Craftsman Garage Door Opener 1/2 HP Chain...

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I have an older craftsman garage door opener that I just replaced the drive gear on. Everything seems to be working properly except that it will not go down unless you hold the button down until it closes...


Make sure you put the black cup back on the end of the motor shaft and that it is pressed all the way on. Make sure the RPM sensor is plugged in. If neither of these are the issue, then you probably did not have the motor shaft pushed all the way back when you tightened the coupler after replacing the worm gear. Loosen that coupler up and from the front of the motor (opposite end in which the coupler is on) push the shaft back as far as it will go. Hold it there while you tighten the coupler back up and then try it.

Oct 15, 2011 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Door won't go down unless I continue to hold the button. Once I release the button the garage door goes back up.


Check your door sensors. They have either been bumped and no longer point at one another or one of them has quit. Make sure the small light on each one is lit and not flickering. Tweak them a bit.

Apr 18, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

I have a quantum model 3212 serial #3000...fcc id #kj8intrmt...ok im trying to program my garage door to my truck..help please


1. In the vehicle press and hold the two outside buttons until the indicator light begins to flash (after 20 seconds). Release both buttons. Note: Some vehicles may require the ignition switch to be turned to the second (or "accessory") position during the programming process.

2. Hold the end of your handheld transmitter between 1 and 3 inches away from the Homelink surface (located on your visor or overhead console) keeping the indicator light in view.

3. Using both hands, simultaneously push the handheld transmitter button and the desired HomeLink button. DO NOT release the buttons until step 4 has been completed.

4. Hold down both buttons until the indicator light on the HomeLink Wireless Control System flashes, first slowly then rapidly. When the indicator light flashes rapidly, both buttons may be released. (The rapidly flashing light indicates successful programming of the new frequency signal.)

To train your garage door opener.

1. Locate the smart/learn button on the garage door opener motor head unit.

2. Press and immediately release the smart/learn button.

Firmly press and release the programmed HomeLink button. Press and release the HomeLink button a second time to complete the training process. (Some garage door openers may require you to do this procedure a third time to complete the training.)


Feb 23, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

My garage door won't close unless I hold the main button down in the garage. As soon as it closes it opens up again unless I press the button quickly. I can open it up using the remote, but cannot close it...


your garage door has saftey sensors at the door
these are photo eyes
in the owners manuel that came with the opener
that has pictures in it which would help
the photo eyes need to be clear of debri and aimed at each other with no obstruction
there are leds on each sensor and when aimes properly they should be light if i remember correctly
if you can not get them to light then you may have to replace the sensors

Oct 27, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Liftmaster pro 1/2 hp wont shut in one button press


You have a door sensor problem. Either your main light bulb is burned out or you don't have one in your opener. The clicking sound you hear is the relay for the light. Both of the door sensors should have a small light that is lit. Tweak them until they are.

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

2 Answers

My garage door wont go down.I habe to hold the switch down but if i let it go the door will go up again.


I have a Liftmaster garage door that won't go down unless you press and hold the wall button. The sensor lights are both on. The green light on the unit flashes unless I press the reset button. As soon as you press the wall button it flashes again and the door won't go down unless you hold the button the whole time. The remote wont' make it go down either. It begins to sometimes and retracts, but sometimes the light bulb just flashes (like it is obstructed). I tried replacing the wall switch and that did nothing. Help!

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

14 Answers

Sears craftsman 1/2 hp garage door troubleshooting


My garage door opener will start to close then stop and go back to the open position. If I put pressure on the door as it is closing sometimes it will close all the way and sometimes it will return to the open position. Can you help me. Thanks pbstation771@verizon.net

Aug 18, 2008 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Sears craftsman garage door opener


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.

ARE BOTH LEDS ON? - CHECK FOR A LOOSE OR BROKEN WIRE.
ARE THE EYES WIRED CORRECTLY?
ARE THEY AIMED AT EACH OTHER?

Jul 13, 2008 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Door will not close


the eyes are a little bit out of adjustment

Jan 09, 2008 | Sears Craftsman LiftMaster Chamberlain...

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