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

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I have a craftsman 1/2hp opener part # 41a5021-2g 2002 model year. The remotes worked fine all the time and all of a sudden 2 days ago they quit working. I changed batteries but no luck. Any help would be appreciated. This was a sudden unexplainable change.

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Someone hit vacation or lock on wall control?

Posted on Jan 15, 2009

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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")

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