Question about liftmaster Chamberlain Garage Door Opener Transmitter 300MC

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We moved into a house with an old Chamberlain garage door and keypad and don't know the combination or how to program it. Help please

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Press the colored learn button on the motor head and then within 30 seconds enter in the 4 digit code followed by the up/down action button. The light bulb should flash to let you know it has been coded. Make sure the battery is good as well. Wait for 2 minutes and try. Thanks BB

Posted on Sep 03, 2010

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