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

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Door goes up on its own after using remote to close door upon returning home to find door is open

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Make sure the door doesn't hit the floor and then reverse. If it does you need to adjust the 'down limit' which is on the side of the motor unit. Turn it a bit in the opposite direction of the arrow printed on the cover. You may also have a bad wall control or the wiring to it. The wall control goes bad from use and the staples holding the wiring sometimes cuts through the insulation and cause intermittent operation. You can eliminate this possibility by removing the wire on terminal #1 on the rear of the motor unit. You can eliminate the wall control by removing the wires connected to the back. Your remotes will still work.

Posted on Sep 21, 2009

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When you shut the door next time make sure it stays down. if not adjust up down on the operator. or it's hitting something or your photo eyes are not aligned could be your track loose check and get back to me.

Posted on Oct 03, 2009

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1 Answer

Lift master formula I will not close, only goes half way down, but fully opens. Worked fine until my wife closed the door on the car, after that it would fully close


I had this problem as well with the door opening just fine but was not closing when using the remotes or when breifly pressing the wall mounted control. The door would close only when using the wired wall mount control. I have experienced this problem with other garage door openers I've had in my previous homes and it was always caused by sensors at the bottom of the door tracks being either misaligned or the lenses were dirty. In this case, and it was just a moment ago today, I simply cleaned the sensor lenses and then the door began to function properly. Give it a try.

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Sounds like one of your neighbors may have recently replaced their own garage door opener and it coincidentally operates in the same frequency band as yours. One of them may also have purchased a new car and recently programmed it to open their door, but it inadvertantly interferes with yours. Depending on the quality of your door opener's receiver and how old it is, some receivers are not as good as others in their ability to discriminate against similar transmitted codes in the same frequency band. When the door opens by itself immediately go outside and see if a neighbor's door has just been opened (or closed) at the same time. Does your door open by itself at similar times during day? Like when a neighbor might be leaving or returning home from work? When someone uses a remote to close their garage door when leaving home, they (and the remote) are usually located in their driveway, but when they use it to open the door upon arriving home, they might be located right in front of your house.

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I have a LiftMaster garage door opener. It has started to act up a bit, and I can't seem to locate the problem. It opens just fine, but when we try to close it, with either the remote or the wall control,...


If the opener feels any resistance it will act like this.Make sure that the rollers on the door to frame are oiled well and turn easily, move in and out easily as well, you can also turn the screw to increase the resistance stop pressure.Oil the rollers well

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I really need your help. My Craftsman unit model number is 139.53615SR manufactured 1/92. I have a three car garage. The original two remote controls were lost and since then I've used the setting in my...


Have your neighbor bring over his remote and open or close your door with it. Then hold the smart/learn button in for 6 seconds on your opener. Then see if he can open your door. He shouldn't be able to because that procedure erases the memory in your opener. No remotes should work. You need to get that remote #53778 back and program it and then see if your neighbor can open your door. If he can open your door at any point after you have held that button in for 6 seconds you need to get a new door opener.

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In most cases, when a garage door opens or closes by itself, or when you find your door open, upon returning home, the problem is due to a short somewhere. This short is most likely to be in one of two places: either in one of your transmitters or in the wall button or its wiring.
When there is a short in your garage door transmitter, you will often find the garage door is up upon returning home, even though you know you closed the door when you left the house. A short in your transmitter causes a continues signal to be sent. As you are pulling out of the driveway the garage door closes fully and appears to stop, but as the carriage and arm run past the down limit and hits the header bracket it reverses, and the door begins to open, just as you start driving off down the road. You come home to find the garage door is up, as if someone else had opened your door. The best thing to do to troubleshoot the garage door problem is remove the batteries from your transmitters and try operating the door from the wall button. If the problem is intermittent, you may want to do this for a day or two to eliminate the transmitters as the culprit.
If the problem persists, try removing the wall button wire at the motor head to ensure it is not a short in the wire to the button, then try operating the garage door with the transmitters only. If it stops the problem, replace the wires and test the wall button. It is a process of elimination.


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1 Answer

Garage door opens whenever it wants to


In most cases, when a garage door opens or closes by itself, or when you find your door open, up returning home, the problem is due to a short somewhere. This short is most likely to be in one of two places: either in one of your transmitters or in the wall button or its wiring.

When there is a short in your garage door transmitter, you will often find the garage door is up upon returning home, even though you know you closed the door when you left the house. A short in your transmitter causes ta continuous signal to be sent. As you are pulling out of the driveway the garage door closes fully and appears to stop, but as the carriage and arm run past the down limit and hits the header bracket it reverses and the door begins to open, just as you start driving off down the road. You come home to find the garage door is up, as if someone else had opened your door. The best thing to do to troubleshoot the garage door problem is remove the batteries from your transmitters and try operating the door from the wall button. If the problem is intermittent, you may want to do this for a day or two to eliminate the transmitters as the culprit.

If the problem persists, try removing the wall button wire at the motor head to ensure it is not a short in the wire to the button, then try operating the garage door with the transmitters only. If it stops the problem, replace the wires and test the wall button which can also go bad. It is a process of elimination.

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2 Answers

Garage door will not close using remote unit.


It is an issue with safety eyes. Make sure both lights are on located on the eyes. If not, realign

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