I hae a Chamberlain Whisper Garage Door Closer. When I press the button to close the garage door the light flashes and I have to go to the wall control and shut it that way. Why is it doing this? Also, How do I repregram the numeric pad?
Car Audio & Video - Chamberlain - Powerdrive PD422D 1/2 HP Security Plus Screw Drive Garage...
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