Question about liftmaster Chamberlain Garage Door Opener Transmitter 300MC

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Inside light on garage door opener blinks twice when remote contr

When remote control is used.  Hardwired controls work fine.  Hidden security password opener  works fine, too.

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  • sethmichelle May 11, 2010

    Hi there, What type of make and model do you own? In most cases these are indications of problems. If it is only the remote control that causes this situation and the garage door it self works properly with keypad and hard wire then it could simply be an indication of low battery on your remote.


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YOu will need to explain the problem for an accurate answer. Thanks BB

Posted on Sep 05, 2010

  • Jaosn
    Jaosn Dec 28, 2013

    I had the same problem.... The lock button has been pressed. To unlock, press and hold to clear it and everything will work fine.


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Oct 22, 2014 | Electrical Supplies

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