Question about liftmaster Chamberlain Garage Door Opener Transmitter 300MC

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Garage door opener won't go down

My garaage door was working fine. Yesterday after I opened it and try to close, it won't close. I open and check it motor is fine, but look like it working one way up only not the other way down. I checked stopper tongue blade it was fine when blade touched upper stopper. I guess ther some thing went wrong with PC board?

Thanks,
Adam

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  • Anonymous Mar 25, 2014

    when press the button for garage door is go very slow up and down or just motor is running the door

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Hi there, First start with the easy stuff. Is there anything blocking the "eyes"? If so clear a path for the infered beam, second actuate the hard wired push button on wall near door to insure freedom of movement. Thirdly manuely actuate the limit switches by hand if you have them on the rail system. older doors can and do have limit switches that can become stuck expectually if there is alot of dust and debre in the air. what model do you have?

Posted on Mar 17, 2009

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