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

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My opener does not operate remotely in the evenings... works great during the day.

I have tried eliminating other frequency problems - such as CFC light bulbs

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Have you tried making sure you don't have motion detectors on light by the door. This will sometimes cause trouble when the sensors are going bad or if you have cfc or led bulbs in them.

Posted on Apr 27, 2015

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Actually Jeffrey, since your opener isn't human, it can't possibly know whether it's day or night, so the problem lies elsewhere. You don't say how close you are to the door you are. My opener is older and very touchy and doesn't always respond when pushed because the contacts are worn. Try this, take the opener off your visor. turn it
face up and then see if it works. If it does, its time to get a new opener. First make sure the battery's good. Hope this helped, Ken

Posted on Apr 23, 2015

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Thoroughly check all the connections. temp changes might effect connectors.

Posted on Apr 20, 2015

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1 Answer

What could be the problem with garage door opener?


Many openers have a short length of wire that serves as a primitive antenna; ensure the wire is hanging free.

The remote is a radio frequency transmitter, the other end in the garage has a tuned receiver.
Either one of these can drift from their original operating frequency which then can cause the system to fail.

Most modern openers are encoded so that they can resist operating with CBs and amateur radio signals and most require a one-time operation that allows the inside receiver to recognize (and remember) its dedicated remote by its frequency and the unique code the remote produces.

While this principle makes openers more secure, it also allows for more failures of the type you are having.

Take a look at the manuals available at the following site to see is there is one close enough to your model number to let you restore the programming between remote and receiver:

Free Craftsman Garage Door Opener User Manuals ManualsOnline com

Jul 21, 2014 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Liftmaster 3265M Garage Door Opener opens on its own


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.

Nov 25, 2012 | Home Security

1 Answer

I can't get either one of my remotes to learn to open the garage. I have followed the instructions and still neither one works. I even clear the codes after each unsuccessful time. Please help.


Hi, the Liftmaster 371 remote control operates on the 315MHz frequency, ensure your receiver works on this frequency, some Liftmaster remotes and receivers operate on 390MHz.371 remote is compatible with models manufactured from 2005, and all Chamberlain Liftmaster and Sears garage door openers with a purple learn button and purple antenna.
You can find further details here chamberlain-liftmaster-garage-opener-parts

Aug 25, 2011 | liftmaster 371 Remote Transmitter

2 Answers

I cannot get my universal Clicker by Chamberlain KLIK1U to work with my Quantum 3212 garage door opener even though it says that it works with this model. I have followed the instructions and tried...


The klik1u does not operate at a 303mhz frequency therefore it will NOT program to the quantum 3212 but the actual remote from Wayne Dalton is only 2 dollars more than wal mart charged me for the klik1u when I bought it to try

Jan 10, 2011 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

My Hunter remote controlled fan worked great for the first few years, but now the the light comes on and the fan turns off at the same time without me touching the remote or the switch on the wall. Wakes...


Sorry to read about your problem, I hope this helps you out.

you may have a defective remote reciver or even a bad remote.

Take the battery's out of the remote for a couple of days, if the fan turns on, the remote is good.
you can have the remote receiver replaced, they run around $60.00

I tried to help you. Please help me and Rate/Vote on my response. We take the time to answer your question. take the time to rate us.Thanks and good luck

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Dec 29, 2010 | Hunter 52" Ceiling Fan With Light And...

1 Answer

Genie Compact 3-Button Remote control will only open 1 door/not 2


On some of the remotes you will find a toggle switch to change frequencies, this might help. Note all new openers are operating on a different frequency than slightly older ones due to military interference. Even though both might be intellicode they might not work together on the same remote. Sometimes some openers are harder to program than others. So lets try to program the harder one. You need to find and press the learn button on the motor head. Then press the button on the remote once. The led light by the learn button should not flash. If so try it over. The light should either stay lit or go out after the first press. If it does press it again and then a third time. If it ever flashes during the program process try again. The third or fourth time the motor should operate. If not you either have a bad remote or more than likely a bed logic board. Thanks BB

May 15, 2010 | Genie Company IntelliCode GICT390-1BL...

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.

Oct 05, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Remotes won't work


Sounds like a frequency issue. A remote work like the radio in your where each station is on a different frequency. Some signal is interfering with you frequency (390Mhz) You could try another brand external receiver with new remotes or with that old of an operator you might just think about replacing the operator (don't go with "Wayne Dalton")

Nov 27, 2008 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Lg CRT monitor model 500g 17inch -out of frequency


First, you did a great job of explaining and starting to identify the problem. You also eliminated a few things that we would have tried along the way.
PROBLEM DEFINITION: The real issue (as you may already know) appears that the operating system, specifically the software drivers for the video board and monitor, must be correct in order for the monitor to work. In other words: there are three computers that must be able to communicate with each other - the main computer, the video board computer (microprocessor) and the monitor's computer (also a microprocessor). Think of the drivers as the programs for each of the microprocessors. The message you are getting says that one of the three programs is sending data to one of the other programs and that the receiving program is complaining that it is "talking too fast to understand".

So, which one? Since you are not having any problems with Win98 or 2K then it is not a problem with the monitor (or so it seems). Since each Windows operating system must load its own driver, and many times these drivers are not the same (actually the "kernel" is if you think of them as programs for the microprocessors) because they must talk to the operating program too. I'm puzzled about the "...safe mode...didn't work..." comment since safe mode doesn't load the drivers on purpose. Maybe it worked at first and you didn't change anything so it didn't work when you logged back on without safe mode?

POSSIBLE SOLUTIONS:
1. Start up in Win2000 and look at "properties" for the video board and monitor. Use "advanced" if necessary and write down all of the driver names, the make of the vidoe board and especially the "frequency" of the monitor that it "thinks" it is. If it is "auto" then see if there are any other choices (50,60,65,70,72 and 75 are all popular sweep frequencies). Note that the video card AND the monitor must be able to communicate at the SAME frequency. One of them (or both) can be on "auto" but one can't be on 60 and the other on 72! This will produce the error message you describe.

Now, try to start up your WinXP (safe mode if possible) and fix (match) the properties/frequencies. You will have to bring up the control panel to do this since the "properties" selection is locked out in safe mode.

2. If this doesn't work then it might just be a program that is loading during startup. Check the "run=" statements in the Win.ini and system.ini files for WinXP. Remove or comment these out. An older game or application that didn't work on WinXP may try to grab the video before the system would start. Eliminate, or comment out if you don't want to eliminate any that you might want to keep, any program that you suspect or just don't have a clue what it does. Suspect programs that load on startup are virus checkers that were not written for XP.

3. Save, preferably on a removable device (USB thumb drive) your current video card and monitor drivers for WinXP as a backup. Log in using Win2K, download current drivers for your video card and monitor, also onto the thumb drive. Then, delete the drivers from the device manager. When you restart it should say "found new device" for both the video card and the monitor. It should then ask for the drivers. Point it to the thumb drive and load the new drivers.

Please rate this solution and let me know how it turns out...

Jul 17, 2008 | Computers & Internet

2 Answers

Fan turned on by phantom signal


If you have more than one fan and they have remote controls they may be set to the same frequency. You can re set one fan to operate at a different frequency. The instructions ar in the manual or online.

May 26, 2008 | Casablanca Fan 3245T Ceiling

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