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

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Garage Opener Model 3255 Chamberlain Lift Master

The Chamberlain Lift Master Professional garage opener opens by itself and closes by itself during the day. What is causing it to do that and what can I do? Model 3255

Raul

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The most common cause of this problem is a bad wall control the wiring going to it. You can eliminate both temporarily by removing the wire at terminal 1 on the back of the motor unit. The wiring sometimes is shorted by the staples the installer uses. The wall control gets used a lot.

Posted on Jun 23, 2009

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Posted on Jan 02, 2017

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