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

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Motor is driving only one direction counter clockwise that closes

I am unable to open my garage door, motor is driving only in one direction that is counter clockwise, which closes the door, even I release the door knob but still the same.

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  • marty metzger May 11, 2010

    have no idea what you are saying . explain better and i will help

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  • 504 Answers

TRY UNPLUGGING FOR ABOUT 5 MIN.

THIS RESETS THE CIRCUIT BOARD.

IF THIS DOESN'T HELP TAKE OFF THE COVER AND LOOK AT THE LIMIT SWITCHES IT MAY BE RESTING AGAINST THE UP LIMIT - THIS WOULD TELL THE DOOR TO CLOSE - THE CHAIN MAY NEED TO BE SHIFTED - WITH THE DOOR FULLY CLOSED AND THE OPENER RESTING AGAINST THE CLOSED LIMIT REINSTALL THE CHAIN. & THEN RECHECK ALL ADJUSTMENTS

HOPE THIS HELPS

Posted on May 28, 2010

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Merlin 2500L garage door motor is reaching 3/4 close and reversing back to open with no obvious obstacles in its glide path. Does anyone have this problem and fixed it?


Hi, There is a screw on front part of the motor IE: chain side of the motor this makes the adjustment by turning it to make your door open/close by the correct amount, also remember to oil the moving parts as these require regular maintenance. Please leave me feedback, best wishes, Malcolm Campbell.

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Chamberlain Power Drive / Whisper Drive My garage door starts to open and immediately reverses but continues to run. I had to release the cord to allow the chain to run its course before it would stop....


It sounds like the door is your problem.
Check the counter balance spring above the door. It is likely broken.
If the door cannot be operated manually, the garage door opener will not open it either. The machine is made to operate a door that works correctly. If the door is broken, the machine will not work either.
It also sounds like the opener gears may be worn out. That also occurs because the door required service.

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I have a chamberlain whisper drive garage door opener. When I open the door and it reaches the top it starts making a loud noise. It's like the motor is still trying to pull the door up but it can't...


SOUNDS LIKE THE UP LIMIT IS EITHER OUT OF ADJUSTMENT OR NOT WORKING.

TURN IT ABOUT THREE TURNS COUNTER CLOCKWISE. THIS SHOULD BE ENOUGH TO MAKE IT NOT OPEN ALL THE WAY. THEN ADJUST IT 1/2 TURN AT A TIME THE OTHER WAY UNTIL IT GETS CLOSE THEN SMALLER ADJUSTMENTS TILL YOU ARE HAPPY WITH WHERE IT STOPS.

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My Craftsman 1/2 Hp garage door opener doesn't stop going down despite (quite forcefully!) applying pressure in the opposite direction. It would buckle (and did) if I don't let it continue unhindered...do...


YOU NEED TO ADJUST THE DOWN FORCE.

YOU WANT TO TURN IT COUNTER CLOCKWISE TO THE STOP (THIS ADJUSTMENT IS ONLY ABOUT 3/4 TURN FROM MIN. TO MAX.). THEN TRY THE DOOR IF IT REVERSES TURN IT ABOUT 1/16TH TURN CLOCKWISE. CONTINUE THIS VERY MINOR INCRAMENT ADJUSTMENT UNTIL THE DOOR CLOSES WITHOUT REVERSING. THEN GO 1/16TH TURN FURTHER.

YOU SHOULD BE ABLE TO STOP THE DOOR AND REVERSE IT BY GRABBING THE BOTTOM OF THE DOOR AS IT GOES DOWN AND LIFTING SLIGHTLY. IF YOU CAN'T GET THE DOOR TO BOTH CLOSE AND REVERSE WITH MODERATE PRESSURE YOU MAY NEED ADJUSTMENT TO THE DOOR / SPRING / ETC.
- I DO NOT RECOMMEND ADJUSTING THE DOOR YOURSELF - CALL IN A PRO FOR THAT.

IF THE ADJUSTMENT IS SUCCESFUL ADJUST THE OPEN SENSITIVITY / FORCE IN THE SAME MANNER.

HOPE THIS HELPS

Jun 28, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Our gARAGE DOOR OPENS ALL THE WAY BUT ONLY HALF CLOSED


Go to the main unit ( motor ) on one side youre going to see two holes , one is for set up how far will open , and the other hole is to set up the travel of the door when it closes. theres a travel direction arrow around the holes , one is counter clockwise and the other is clockwise. hope this helps AJ

Dec 18, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage door opener closes when closed


Try this: Loosen the chain enough that you can remove it from the sprocket above the motor. Now run the opener until the sprocket turns in the clockwise direction and stops. Reconnect the chain. This will get everything in sync and you will have to tweak the 'up and down limits' a bit to get it just right.

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

3 Answers

How do I reset my garage door opener. It is a Coromaster 2000 motor. The closing and opening setting are out and the motor only stops due to resistance.


The Coromaster 2000 does not operate off limit switches. It has a quarter-revolution optical pulse counter. To re-program the open and close limits do the following: Ensure that the door is open at least a couple of feet. Press the reset button once or twice Short out pushbutton and common and hold until close limit and then release. Door should stop at your new close limit. Wait 5 seconds. Short out pushbutton and common and door will open. Hold the short until open limit and then release. Limits should now be set.

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

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Door dosent close.move about 1 ft then opens.gear was replaced prior.worked for 2 days.now will not close.no flashing warning lights,when door disconnected garage door ok, springs ok,disconnect chain from...


You may not have had the motor shaft pushed all the way back when you tightened the coupler after replacing the worm gear. Loosen the 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.

Jul 24, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Opener will not reverse


FIRST YOU NEED TO RESET THE CHAIN .

Unplug power
Release the door from the opener close the door manually. take the chain loose and slide the traveler down to reengage with the trolley. Plug in power, run the unit with chain off untill it completes a clockwise cycle and stops. reconnect the chain and set tension.

Adjust the chain tension.

If it still moves 6-8 inches and flashes 5 times. the problem is in the rpm sensor.

Full diagnostics are in the owners manual - FREE at
http://help.chamberlain.com/help/en-us/InstructionManuals

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1 Answer

Garage door opener problem


If the safety eyes are not connected you need to ho;d the button down until it reaches the close linit.

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