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

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Replaced door sensors now door will not go down and light flashes

Sears Garage door opener model139.18851. One sensor broke so relaced both of them. Now door will not move when activated and the opener light flashes. The red light on the sensors do not go off when eye is covered , I beleive the red light should go off when covered? Opener is 15 years old.
Chuck

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  • Anonymous Mar 17, 2009

    door sensor on one side is yellow when hitting the open button does not go down and light flashes

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The safety eyes are either installed wrong, or you have the wrong type. Craftsman (liftmaster) has what they they call old style and new style safety eyes. You can not interchange the types.

Posted on Feb 17, 2009

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1 Answer

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Sep 23, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

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Jul 30, 2009 | Sears Craftsman LiftMaster Chamberlain...

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The flashing light in your wall control is a separate problem. One of the buttons on the wall control has an icon of a lock. Press and hold it for 3 seconds and release. It should stop flashing.

Jun 15, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

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Feb 17, 2009 | Sears Craftsman LiftMaster Chamberlain...

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