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This video demonstrates how to install the cable tension monitor on a ListMaster garage door opener, model 8500.
For more information about the LiftMaster products covered in this video, please reference the following articles:
What is the Purpose of the Cable Tension Monitor? Residential Jackshaft Opener: bit.ly/PurposeofCableTensionMo...
LiftMaster 8500 Wall Mount Garage Door Opener Installation Overview: • Video
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