@Carl Here is how I think it's set up: Power comes from the circuit breaker into the wall outlet that is at the bottom of the stairs (since it's the closest to the circuit panel). From there, power...

@Carl Normally, when a switch is connected/dependent on another for power, it's when the first switch feeds the second with a load wire. That's now how this is wired. The toggle switch and the HS210...

@Carl I solved the "issue" but still don't know what caused it. I swapped the toggle and HS210 and the issue disappeared. Now I can operate both switches without the lights flickering and the HS210...

@Carl Hi Carl, The switches are from separate packs. One was purchased from Amazon, the other from Home Depot (locally). Both exhibit the same behavior. Additionally, I checked the old switch (the...

@Carl Hi Carl, Yes, the hot is connected to the black screw (always hot unless breaker is off), with two travelers connected to the brass screws on top. The manual switch also has a hot line that is...

Hey guys, So this is weird. I just installed an HS210 3-way switch in my basement. The partner switch is a regular toggle switch and is on the other side of the room. I connected the switch the way I...