Question about Chamberlain 1/2-HP Whisper Drive Belt Drive Garage Access System

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The opener seems to want to continue closing the door once it hits the ground. Seems like the closing mechanism needs to be adjusted back closer the the garage door closer unit. This did not just happened. It has worked fine for an extended period of time and seems out of alignment from its use over time. (The product is actually a 3/4 HPS Whisper Drive Plus)

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Try to re-program travel and force limits. Make sure that travel limit (down) does not go too far (thus excessive force). Apparently this system has a force sensor that senses if there is something in the way of the door. This is different from the safety sensor "eyes". The problem in your setup is that you have programmed the door to travel down too much and he system looses its ability to use force sensor. Adjust travel limit (down) to a little less travel and you will be fine.

Posted on Nov 01, 2010

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