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

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Starts and stops, must push button several times

Door will not close all the time sometimes it will not move or if if does it moves only a short distance, sometimes its closed as it should.

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I would guess that the batterys need to be changed? is it extremly cold were you are as that can affect the doors performance

Posted on Jan 19, 2009

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As you push remote door travels a shot distance stops,push button and travels short distance again and again. What is wrong?


Most common failure is internal plastic gear. If we assume that this is the failure i would suggest disconnect the travel engage latch to the non engaged position. Cycle the door and observe if there comes a time that the motor is humming and the chain or latch is not moving. Other than reversing for just a brief moment at the end of travel at no time should the motor hum as turning and the latch feature not move.

What I suspect is happening in the down direction door wants to close and as the gear rotates the gear slips . This repair is not so difficult for the DIY with some mechanic skills and tools. Lots of u-tube showing you how, Parts are available. Confirm the right part for your specific model. Purchase the gear and shaft as an assembly if you not sure about the difficulty. Part prices are all over the map. Shop around. You can buy just the gear a little more difficult to replace.




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His 15 minute estimate may be a little optimistic.
Craftsman LiftMaster Garage Door Opener Won Open or Close Fix the Stripped...

Jan 10, 2016 | Garage Doors

1 Answer

Door goes down and when it stops at botton, it turns and goes back up ??? Need adjusting ..How can I adjust???


Adjust the position of the door by using the black and purple buttons. Black moves the door UP (open) and purple moves the door DOWN (close)
Setting the up position: 1. Press and hold the black button until the LED starts flashing slowly, then release. 2. Push and hold the black button until the door reaches the desired UP (open) position 3. Push the door control or programmed remote control. This sets the Up (open) position and begins closing the door. 4. Immediately when the door begins to close press and release the black or purple button. This will stop the door Setting the Down position: 5. Push and hold the purple button until the door reaches the desired DOWN (Closed) position. 6. Once the door is closed, If there appears to be too much pressure on the door, you may toggle the door back and forth using the black and purple buttons to reach the desired closed position. 7. Push the door control or programmed remote control. This sets the Down (closed) limit and the door should open.

Aug 11, 2011 | Chamberlain 3/4-HP Whisper Drive Plus...

1 Answer

I have two craftsman door openers. They work great with pushbutton on wall, open and close ok. The door opens fine with remotes ( one handheld other homelink in car ) but will not close with remote. It...


If the main light flashes 10 times and the door reverses to the open position it is a door sensor problem. Make sure the lights on the sensors are both on and not flickering. Tweak them if necessary. If you cannot get both lights to come on you have bad sensors or the wiring to them.

Dec 27, 2010 | Sears Craftsman LiftMaster Chamberlain...

3 Answers

I have a craftsman garage door opener and I have to hold the button down in order to close the door. The door opens fine and the sensors are clear. The unit starts to close then stops, the lights start...


When you can close the door by holding down the wall button it IS the safety eyes or wiring.

If the eyes are mounted to the track. Many times the track wll move as the door closes causing the eyes to move out of alignment.
Watch as the door moves down and see if they need to be adjusted.

If the eyes are not both lit - they are out of alignemnt or have a wiring problem. try adjusting them and see if the lights come on. - if not check the wiring

Hope this helps

Jul 12, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

The door opens when i push to open but when i push to close it starts to close until i stop pushing the button. When i release the button the garage door opens back and clicks 10 times


Check the door sensors. They must be pointed at one another and the small light on each one must be lit and not flickering. Tweak them a bit. If you cannot get both lights to come on you have either a bad sensor or the wiring to them is shorted or broken.

May 11, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

When we push the button for door to close it moves an inch and the light blinks several times. if we hold the button the door will close all the way. there is nothing blocking the floor sensors and the...


Most likely one of your door sensors has been bumped and is misaligned. Check to see that the small light on each sensor is lit. The only thing that will cause the main light to flash 10 times when the door reverses is the sensors or the wiring to them. They must be pointed at one another for both lights to be on.

Jul 12, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Wall button stoppd working.


If the wall button is locked it will only prevent the remotes from working. They do go bad. Try removing it from the wall and short the 2 wires on the back together momentarily. If the door moves you will know the button is bad. If not try momentarily shorting terminals 1 and 2 together on the back of the motor unit. Maybe the wiring to the wall control is bad. It won't shock you so you don't have to worry about that.

Jul 07, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

GARAGE DOOR OPENS AND CLOSES ON OWN LT BLINKS SEVERAL TIMES


Anytime a door opens and/or closes by itself I look for a smashed wire between the motor unit and the wall button.

If the wire is smashed the insulation becomes so thin that power will leak thru the insulation and activate the door.

Loosen the staples with a small screwdriver and slide the wire about ½ inch to move any areas of thin insulation away from the staples.

The second thing would be a bad wall button or a remote with a sticking button.
Or a remote in someone’s purse that gets the button pushed by other stuff in the purse.

The test is to disconnect the push button wires at the power unit. If the self operation stops you have located the problem. If you reconnect the wires and disconnect the wire at the wall button this will tell you if the problem is the wire or the button.

This can also interfere with remote controls

HOPE THIS HELPS

Mar 12, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Door won't close unless i push button on wall several times


You probably have a stripped gear inside opener. Take off cover and the bottom will be filled with white flakes from stripped gear

Jan 23, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

We close our garage door when we leave and we will come back home and it is open. Sometimes the time frame is a long time, other times it is a short period of time. We want to change the codes but there...


Anytime a door opens and/or closes by itself I look for a smashed wire between the motor unit and the wall button.

If the wire is smashed the insulation becomes so thin that power will leak thru the insulation and activate the door.

Loosen the staples with a small screwdriver and slide the wire about ½ inch to move any areas of thin insulation away from the staples.

The second thing would be a bad wall button or a remote with a sticking button.
Or a remote in someone’s purse that gets the button pushed by other stuff in the purse.

The test is to disconnect the push button wires at the power unit. If the self operation stops you have located the problem. If you reconnect the wires and disconnect the wire at the wall button this will tell you if the problem is the wire or the button.

HOPE THIS HELPS

Sep 02, 2008 | Sears Craftsman LiftMaster Chamberlain...

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