Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+

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When the temp gets to about 40F or below neither the remote or the door switch will activate the door to close; only if you continue to hold the door switch will the door close - opening works fine. Can you help?

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Does the main light flash 10 times? If so it is a door sensor problem and you need to make sure they are pointed at one another and the small light on each one is lit and not flickering. Make sure they are tight in their brackets and that the cold isn't causing them to warp out of alignment. If you cannot get both lights to come on you may have a sensor that is quitting due to the cold. This is not uncommon with electronic components.

Posted on Nov 18, 2009

Testimonial: "Thank you so much - this solved my problem! The flashing light is a very useful clue to alignment of the sensors - wish I had know this before."

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