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

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Light flashing and it won't close

After the day I washed the gargage's floor, it won't close anymore.
No problem on opening. The light was flashing with "da da da da" sound whenever I am trying to close it. really ned help!!

I am sure there is nothing between the sender/receiver sensors, somehow i don't really see the little green in the sender sensor.

For now, I can close the door only if I press the button continuously until the door was closed completely.

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  • Anonymous Aug 17, 2008

    have to keep pushing opener to close door

  • Anonymous Aug 17, 2008

    i have the exact sames isses

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  • 258 Answers

This is either a misaligned or bad sensor. you can move the sensor up and down until it gets a green light. They must be aligned or the GDO will think there is something in the way. otherwise, it could be wiring. These don't really go bad.

Posted on Aug 18, 2008

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