Question about liftmaster Chamberlain Garage Door Opener Transmitter 300MC
These safety sensors do not have to be exact but need to point at each other. Make sure there is no obstruction like leaves... Also make sure the surface they are attached to is stable as well. To align them there will be a wing nut or some other type of adjustment on the sensor assembly. Thanks BB
Posted on Sep 03, 2010
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Posted on Jan 02, 2017
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