Exactly how does C wire adapter work?

C adapter works by adding logic to control both the fan and compressor on the Y wire, allowing the G wire to be used as C.
When you hook up the C adapter, you need to tell the wyze that you are doing that, and make sure that the wire that used to be connected to G on your thermostat is now connected to C on your thermostat.

Here’s a schematic:Thermostat wiring diagram, voltages? - #28 by demiller9

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