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

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I have a old Stanley model 1150 garage door opener. I only open it via a one off switch which I have connected to the two terminals on the back of the unit. Today it would sometimes would not open or close with the switch, but at times it would after I unplugged the power to the unit for a bit. Other than this, the old opener works fine. If it is the circut board (which I don't think is any longer available)can it be bypassed - so I can simply turn the motor on or off?

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  • 12,061 Answers Your user manual above. I guess it wouldn't hurt to short out those connections, and simply control the unit via the Power On/Off. It should work fine, that's of course, if it actually is the switch, wires are OK, and it may be the "Logic" that the switch triggers to open/close, usually it signals a micro, that this "Port" has a GND, or +Voltage on it, and it then triggers, it may not be a simple switch. But in any event if shorting it out, works, then, YES you can indeed do that and control with the Power On/Off. But first try a replacement switch, and check ALL connections, and wiring first.

Posted on May 30, 2010

  • Steve Engberg May 30, 2010

    Thanks for the answer. I should add, the switch I use is a simple light switch, from which I run 2 pair phone wire. (I use 2 of the wires hooked to the two terminals) Should I try using something else, like a doorbell switch?? Different wire??



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