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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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.

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My 2005 Chevy Uplander has an alarm that indicates when the doors are not closed properly. The alarm has been randomly going off for several months, even though the doors are closed properly. Now the...


check the buttons on the door assembly's ,, one is shorted , its getting stuck so the signal never stops sending , even with the car off you will get that signal for a short time, , you can check them by simply doing a continuity check on the little switches themselves, with the plunger out,, you should have a signal, with it pushed in, you should get no reading

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Rear passenger window won't go down (2003 Ion)


thats what the $75.00 per hr is for. what happens when the button is pushed? noise? clunk? fuse blows? try turning the key to the ON position, and open the door, get inside, now while holding the door open, hold the window button down, now slam the door, maybe several times, this sometimes will jar it loose. watch the dome light when you push the button down. does it dim slightly? IF there is a short it takes time to find, and that what you pay for....time.

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This may be your timer or your start switch may be bad. Hope this helps!

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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

Maytag neptune error? message


Unplug for 10 min to reboot the curcuit board. This will reset the system. Sometimes selecting numerous cycles or pushing buttons a lot in a short period of time can overwelm the little brain in the curcuit. This action will clear the memory of any unwanted comands in the curcuit.

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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...

1 Answer

Buzzing noise, wont work???


The magnatron is shorting, overloading the high voltage transformer. From the picture this looks like an older unit and is probably not worth a magnatron replacement.

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