Question about Chamberlain Powerdrive PD422D 1/2 HP Security Plus Screw Drive Garage Door Opener
I think what is happening is the code in your open has a list of different codes it cycles through to keep someone from "capturing" it and opening the door when you gone.Try having someone help you and program the three units at the same time.
Posted on Sep 06, 2009
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Posted on Jan 02, 2017
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