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I wonder how this could have happened. We have three lights in front of our front door, one hanging above the front door, and two on the sides. I replace the light switch with a Kasa smart switch, and now something weird is happening. When I turn the switch on, the light above the door turns ON and the two lights on the sides don't. However, when I turn the switch off the light above the door turns OFF and the two lights on the side turn ON.

What could be happening here? How would this be "inverting"?enter image description here

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    Can you upload a picture showing all the wires connected to the switch? Mar 16, 2021 at 15:53
  • Yes, can you please post photos of the wiring inside the switch box? Mar 16, 2021 at 23:13
  • Added photo. The switch to the right is the one that controls the 3 lights.
    – K2xL
    Mar 17, 2021 at 15:13

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Figured it out! So the two wires I had in traveller - one actually controls the single light above the front door and the other controlled the two side lights. Hence when I hit the switch it alternated.

So what I did is combined both wires under one of the traveller terminals (the Kasa switch has two "holes" I guess for this reason). Now it works!

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  • @FreeMan -- his "travelers" weren't travelers to begin with Mar 17, 2021 at 23:05
  • @ThreePhaseEel I bow to your far superior knowledge. Comment revoked!
    – FreeMan
    Mar 18, 2021 at 12:09

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