Originally Posted by
johannbiermann
Complete noob here. I have tried searching for something similar, but I'm not even sure of the terminology to search for the right question/answer. I installed my first Caseta Lutron device today - a dimmer switch that has two blacks and a green (neutral). I replaced a switch that controls the light on our kitchen light and fan. The fan is controlled by another switch in the same gang or hole or whatever that is called. Everything went fine with the installation (the switch I removed had a neutral, a single black and a double black (two wires to one area - one via the screw and one stabbed in the back)) - I hooked the ground to the green, the single black to one black cable, and the double black to the other black cable. Turned power back on, and voila, it worked just fine. The other switch worked to power the fan as well, so I thought all was good. However, later, when I went to turn off the kitchen light, I noticed that the dining room light (a separate light/fan device) also shut off! Playing with it a little, I have determined that if the kitchen (caseta) light is on, I can control the dining room light with its normal switch, although when I turn the dining room light off, the kitchen light turns off for a second, then turns back on. If the Kitchen light (caseta) is turned off, I cannot control the dining room light. If both lights are on, and I dim using the caseta switch, both lights dim. What did I do wrong, and how do I fix it? Let me know if you need pics of the wiring or other info. I don't even know what else to describe or show or what might be needed. Thanks for the help!