Question about liftmaster Chamberlain Garage Door Opener Transmitter 300MC
I have a Liftmaster Professional 1/2 HP garage door opener. The garage door will not close unless I hold the button the whole way down. Both of the eyes have lights on.
Make sure the eyes are clean and aligned if the opener thinks something is obstructing its path it will not close
Posted on Oct 10, 2009
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Posted on Jan 02, 2017
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