ZL7431US Stopped working

[sidjohn1]

Is this the type of “stoped working” your talking about?

On/Off Switch Vision ZL7431US

I bought one of these to control a ceiling light that has 3 switch locations. I have seen on the net that I am not the only person that had an issue with this, so I thought it might help the next person if I post the solution that I found. After doing the install I found that I could control the light via smartthings/echo dot, but the switches in the wall no longer worked properly. Support from the vendor was enthusiastic but of no real help. The problem stems from the induced “ghost” voltage on the traveler wires between the switches. I have a particularly long run and found an induced 55VAC on the trigger (green) wire to the module. The fix was to install a 320K ohm resistor between the trigger wire and neutral. That brought the ghost voltage down below 20 VAC and was well tolerated by t…