Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+
I assume you have a Craftsman or Liftmaster operator and you are talking about the photo eyes (sensors). If this is true thanone light will remain on if there is power to it and the other will go out when the photo eye beam is blocked or are not lined up.
Thank you for your your question bry4man. I look forward to answering any more of your questions.
Posted on Jan 03, 2009
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Posted on Jan 02, 2017
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