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

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My system stop open and close the door. My controls do not work. Seems that it lost the conectivity (code) among the control and the motor

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Check to make sure you have power to the opener. Could be a circuit breaker that has opened.

Posted on Feb 07, 2010

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1 Answer

Kenmore 600 dryer


Your door switch for this dryer is stuck closed or defective. The door switch controls the light to come on when the door is open while it also controls the drive motor as a safety device to stop the motor when the switch is opened. Replace the Switch.

Oct 28, 2013 | Dryers

1 Answer

When i hit the remote the door opens about 8 inches, then stops. If I unplug the control box for a while, then plug it in it will work for a few times then the same problem occurs.


The motor seems to be overloading Something must be binding. The motor overload seems to be opening up and shutting down the opener. Once it cools down, the overload closes and the motor will run again.

Jan 02, 2011 | liftmaster Chamberlain Garage Door Opener...

2 Answers

I have a Sears Craftsman HBW0777 Garage Door Opener (Date: 07/94) whose remotes both stopped working - I suspect this is a problem with the main control unit, but everything else with the unit is fine (I...


I had the same issue yesterday with my remotes which are model 850CB. I fixed it by following these steps on Chamberlain's help site:
1. Press & release the "learn" button on the motor unit. 2. Within 30 seconds, press and hold the button on the remote. 3. Release the remote button when the light bulb on the motor blinks. It has learned the code.

http://help.chamberlain.com/help/en-us/programmingInstructions/ and enter your remote model number for re-programming instructions.

That worked for me. Not sure why it "lost" the code in the first place. By the way, I only had to do this for one remote, the other started working after the first was re-learned.

Oct 31, 2010 | Home Security

1 Answer

I have a craftsman garage door opener model 139.53674SRT2. It was working fine and we opened it and closed it twice today with no problem. The third time we opened it, it would not close. Both led...


The led blinking 5 times is the code for "RPM sensor or motor overload." The motor has an thermal switch which opens when the motor get hot from running too much. This automatically resets itself after about 15 minutes. This problem can also be caused when the door opens too far and the trolley jams against the bolt just in front of the motor unit. To correct this you need to loosen the chain enough to eliminate the tension against the trolley and then run the motor until the door closes. While the door is closed locate the 'up limit' control on the side of the motor unit. Turn this control 2 complete turns in the opposite direction of the arrow printed on the cover. Tighten the chain.

Jul 19, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Chamberlain Whisper drive remote control unit not working


THE NEW REMOTE MAY NOT BE THE CORRECT SYSTEM FOR THE UNIT YOU HAVE.
THE ONE THAT DOESN'T WORK MOST LIKELY NEEDS A NEW BATTERY.
NOTE IT MUST BE REPROGRAMED AFTER CHANGING THE BATTERY

HOPE THIS HELPS

May 14, 2009 | Chamberlain 950CB Remote Control

1 Answer

Washer stops with F11 code; door won't open


F-11 ERROR CODE MEANS :

Serial Communication Error Communication between the Central Control Unit (CCU) and the Motor Control Unit (MCU) cannot be sent correctly.

TO RESOLVE THE PROBLEM:


  • Check Wire Harness connectors to the MCU, the motor, and Central Control Unit (CCU)

  • Check the Drive system for any worn or failed components

  • Check MCU

  • Check CCU

  • Check Motor

  • Check Wire Harness


May 05, 2009 | Washing Machines

1 Answer

When I push open or close the unit starts but stops the yellow light on rear of unit blinks 4 times then a short pause and blinks 4 times again and continues to do this



# of flashes

1

2

3

4

5

6

Rapid Flashing





Problem

The Protector System wire open or totally misaligned

The Protector System wire shorted or black/white wire reversal

Door Control or Multi-Function control Panel wire shorted

IR sensor slightly misaligned (dim or flashing sensor LED)

Motor overheated/Possible RPM sensor failure -- unplug to reset

Motor circuit failure -- replace RX/LX board

Liftmaster transmitter with the correct format code being received
(opener not necessarily programmed to respond)

Mar 28, 2009 | liftmaster Chamberlain Garage Door Opener...

1 Answer

Opening & closing by itself


above would not explain unit running in middle of night after door had been closed. I to would suggest taking off wire from motor (white and red). if problem stops, you have a short in wire or a bad pushbutton.

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

1 Answer

Defrost vent door wont open


sounds like you have a vaccum leak or a blockage in the blend door area of the HVAC system most of the doors are controlled by vacuum if not by vacuum on of the servo motors that control the blend door is not functuning properly. Hopr this is helpfull

Jan 17, 2009 | 1993 GMC Suburban

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