I installed a GE 12727 Smart Switch (toggle type) and I appear to have it wired correctly but it’s not turning the light on and off when the switch is moved. Based on what I see on my voltmeter the switch is wired and functioning correctly. For what it’s worth I can’t seem to discover the switch with the smartthings app either.
When the switch is “off” I get 120 volts from the black wire to the neutral and 5 from the red wire to the neutral. When the switch is turned “on” I get 120 from the black to neutral and 120 from the red to the neutral.
The light fixture, if it matters, is a halogen floodlight that was working the moment before I disconnected the old switch.
Your need to be sure? Line goes to line connec5ion, white typically to neutral bundle, then usually black to light? But load could be any color? Is in a single switch with 1 light or in a 3 way circuit?