Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+
If the main light flashes 10 times when it goes part way down and then reverses you have a door sensor problem. Sometimes when they are just a little bit off they will be intermittent like yours. Tweak them just a bit and try it.
Posted on Jan 30, 2010
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Posted on Jan 02, 2017
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