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Craftsman Opener 139.53674SRT1

19 years ago

My keyless entry does not work. I cannot find an instruction manual. I am trying to program the keyless entry unit. After I push the button on the back of my main drive, I then enter a new code and hit enter on the keyless unit. The keyless unit then blinks on and off numerous times. But, the code is not accepted. What am I doing wrong? Thanks!!

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