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

1 Answer

Remote problem I have 2 remotes. Both have functioned properly in the past. However, now both of the remotes wil only operate if the remote is within 4 or 5 feet of the garage door. Prior to this they would function from 20+ feet. Any solution? Thanks, Dennis

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  • magedbmw Sep 13, 2008

    my remotes work when very close the the motor , and i see the door sensors lights one side green and one side yellow ,, any solution ??

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1 Answer

You need to replace your reciever

Posted on Sep 13, 2008

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I for got the password to garage door keypad control model GB-318


1. Press the learn button on the side of the GB-318.
2. Once the learn button is pressed, the LED will
flash quickly. Release the learn button.
3. Within 30 seconds, press
the button on the remote
control you would
like to program.
4. Once the remote control is programmed, the LED
will flash slowly, in the same way as it flashes
in standby mode.
5. You may now operate the garage door opener
with this remote control

Feb 05, 2015 | Garage Doors

1 Answer

I have a 1/2 hp Sears Craftsman Garage Door opener about 18 months old when operating the remote within 5 feet or less of the opener the opener works properly. Upon exiting the Garage about 10-12 feet away...


The difficulty is determining if your remote or the receiver is bad. If you have another remote that works as it should then it is the remote. If you just have the one remote there is no way to tell which is bad.

Jul 16, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

The remote only works when you are within 3 feet of the main board!


If you have other remotes that work properly then this remote needs to be replaced if you have made sure the battery is good. If this is your only remote it could also be the receiver which is bad.

Jul 20, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Craftman 1/2 garage door. Model 13953879. RF intereference issue


Limited range of your remote controls could be related to radio frequency interference that comes from something in your home or in the surrounding environment. Certain electrical devices can radiate interference; this could be almost anything that is plugged into an electrical outlet.


Please keep in mind that the device can be brand new, or can be an item that has been in use for quite a while. Also, the item may continue to function properly as far as you are able to tell. The only problem with the item may be that it has started to broadcast the interference, with no other symptoms noted.


Some devices are more likely to generate interference than others. This includes TV cable, cable amplifiers, surge protectors, fluorescent lights, battery charging devices (power tools, golf carts, etc.), anything that utilizes a timer (sprinkler systems, lights, alarm systems, etc.), and a myriad of others. If the problem seems sporadic, we can safely assume that the device responsible for the interference is only being operated during these times. Again, please keep in mind that the age of the device does not determine if it is capable of broadcasting unwanted interference. Any electrical device can be the source of the problem.


The first step is replacing the battery in your remote. If the range on your remote does not improve, remove the wall control wires from the overhead unit. If the range does not improve you will likely need to replace the remote control. After replacing the remote, or if you have other remotes programmed in to the opener, and the range problem still exists, please proceed to the Power Down test.


Multiple garage doors:
If you have two garage door units and one is working just fine, you will need to start by unplugging the good unit. This will help determine if the unit with no range starts to function properly. If the range comes back to the bad unit then you will need to replace the logic board on the unit that was unplugged as it is emitting an RF signal that is over powering the other garage door opener. If the range does not improve after the “good” unit has been unplugged, replace the batteries and try programming some additional remotes to determine if the existing remotes are the issue. If the extra remotes do not have any range then you would need to replace the receiver logic board in the “bad” unit.


Power Down test:
To isolate potential sources of interference, turn the circuit breaker off to the garage and plug the garage door opener into an extension cord from another room. If the range improves, then the interference is coming from a device in the garage. If no improvement is seen follow the same procedure, this time turning off the circuit breakers to your home, with the exception of the garage and test the remote controls. If improvement is noted, turn the circuit breakers back on, one by one, until the range problem resurfaces. This will allow you to narrow down what room the problem device is in. You will have to go from there to isolate it further, by unplugging and re-plugging the items in that room.


If you are unable to determine any source of interference, then the receiver logic board in the overhead unit will need to be replaced.


Apr 17, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Both remotes worked yesterday, today have to hold them within 2 inches of opener wire. sensor lights at the door are green. The light on the opener is blinking next to the learn button. Replaced remote...


Here is some stuff to check.

Limited range of your remote controls could be related to radio frequency interference that comes from something in your home or in the surrounding environment. Certain electrical devices can radiate interference; this could be almost anything that is plugged into an electrical outlet.


Please keep in mind that the device can be brand new, or can be an item that has been in use for quite a while. Also, the item may continue to function properly as far as you are able to tell. The only problem with the item may be that it has started to broadcast the interference, with no other symptoms noted.


Some devices are more likely to generate interference than others. This includes TV cable, cable amplifiers, surge protectors, fluorescent lights, battery charging devices (power tools, golf carts, etc.), anything that utilizes a timer (sprinkler systems, lights, alarm systems, etc.), and a myriad of others. If the problem seems sporadic, we can safely assume that the device responsible for the interference is only being operated during these times. Again, please keep in mind that the age of the device does not determine if it is capable of broadcasting unwanted interference. Any electrical device can be the source of the problem.


The first step is replacing the battery in your remote. If the range on your remote does not improve, remove the wall control wires from the overhead unit. If the range does not improve you will likely need to replace the remote control. After replacing the remote, or if you have other remotes programmed in to the opener, and the range problem still exists, please proceed to the Power Down test.


Multiple garage doors:
If you have two garage door units and one is working just fine, you will need to start by unplugging the good unit. This will help determine if the unit with no range starts to function properly. If the range comes back to the bad unit then you will need to replace the logic board on the unit that was unplugged as it is emitting an RF signal that is over powering the other garage door opener. If the range doesn not improve after the “good” unit has been unplugged, replace the batteries and try programming some additional remotes to determine if the existing remotes are the issue. If the extra remotes do not have any range then you would need to replace the receiver logic board in the “bad” unit.


Power Down test:
To isolate potential sources of interference, turn the circuit breaker off to the garage and plug the garage door opener into an extension cord from another room. If the range improves, then the interference is coming from a device in the garage. If no improvement is seen follow the same procedure, this time turning off the circuit breakers to your home, with the exception of the garage and test the remote controls. If improvement is noted, turn the circuit breakers back on, one by one, until the range problem resurfaces. This will allow you to narrow down what room the problem device is in. You will have to go from there to isolate it further, by unplugging and re-plugging the items in that room.


If you are unable to determine any source of interference, then the receiver logic board in the overhead unit will need to be replaced.


Mar 14, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Can not program both keypad & remote to operate at the same time


One of your units has reverted from "rolling code" to "billion code" and as you have found they will each work but will not work with each other. The problem is finding out which unit reverted. The most common one is the hand remote but that could be wrong.

Aug 09, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

My keypad works,my remote opener does not, even


It is related. One of the buttons on your wall control is the lock button and has a lock icon on it. Press and hold it for 3 seconds. The blinking should stop and your remote should now work.

Aug 01, 2009 | Sears Craftsman LiftMaster Chamberlain...

2 Answers

Neither remote control will open door but wall mounted button wil


Make sure the code set inside the remote is the same as in the main reciving unit code.

Dec 06, 2008 | Sears Craftsman LiftMaster Chamberlain...

2 Answers

REMOTE CONTROLS WILL NOT WORK-WALL BUTTON FLASHING RAPIDLY


Does your wall switch have a lock feature? By pressing the lock button, the remote control is disabled. A flashing light indicates this feature has been activated.

To deactivate, press and hold the lock button for 2 seconds. The flashing should stop and your remote should work again.

Dec 03, 2008 | Sears Craftsman LiftMaster Chamberlain...

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