I’m assuming based on your description, you have this.
https://community.smartthings.com/uploads/short-url/sL5sDnjiostE3nBqojEVhjROHJs.gif
From the FAQ
For this type of wiring you can use relays or switches by Cooper or Linear which do not require a traveler. Another new option is Lutron Caseta or Leviton’s ZSS10-G0Z switches that do not require neutrals.
See @JDRoberts informative post below for more specific information.
I’ve decided to put this FAQ together to help those with questions about installing GE 3-way switches.
Definitions of terms:
Line: The hot wire from the breaker (usually black)
Neutral: The return wire for circuits (usually white)
Load: The wire that will be hot when the circuit is completed to your light (usually black)
Traveler: In existing 3-way wiring, this wire toggles hot between two switches. In a smart switch 3-way configuration, a smaller charge is looped through the add-on switch.
Some things to know:
3-way wiring for smart switches is different than standard 3 way wiring.
You cannot use dumb 3-way switches with most smart switches (You must purchase the matching GE add-on switch to wire with your GE smart master switch).
If the line is wired into the light fixture, you …
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