Question about liftmaster Chamberlain Garage Door Opener Transmitter 300MC
Hello, My garage door will not open. It makes noise and it seems like the red release cord is stuck. Before this happened the door opened by itself one day. I closed it and it seemed ok for a few days and now it is stuck closed.
Remove the cover and check the drive gear. It is white nylon and is just in front of the motor. It is most likely stripped.
Posted on May 18, 2009
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Posted on Jan 02, 2017
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