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

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Craftsman garage door opener remote failure

I have several remotes to operate 2 doors. one door works on all remotes. the other door will not work if more than 15 feet away from the opener, I have changed batterys and re programed the remotes with no luck, Any help would be great. Todd

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You may be receiving interference. Take all the batteries out of the remotes and try them one by one. You will not have to reprogram them. If you find one shortening the range of the others then get rid of it. Or it may be an outside source. Worst case is you will have to replace the logic board. Thanks BB

Posted on Sep 03, 2010

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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

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