Part 1 Garage Door Sensor Replacement

>> YOUR LINK HERE: ___ http://youtube.com/watch?v=KOl79HMkjsA

This Genie Quietlift 2040 model garage door opener failed to operate properly. It would go up but not go down with the remote. The light would blink 3 time...

Garage door, Garage, Genie, Craftsman, Liftmaster, Sensor, Garage door opener, open, start
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