I have a C wire. On the thermostat panel is says " c wire optional with battery" When I spoke to Wyze they say to set up as if there was no C wire. When Wyze resolved to my email I was told to use the C wire. Using it is my preferable set up b/c it provides a power return.
What should I do? And what is Best? Please say why if you can
If you have a C wire available on your furnace that goes up to the thermostat, or an extra wire in your bundle that you can connect to C and then to the thermostat, then use the C wire.
The Wyze thermostat requires one of three things to power up. In order of best to worst they are, an existing C wire, the C Wire adapter if you don’t have a C wire, or an External 24 volt power supply. However, if you have a C wire available, that’s the best option.
I don’t know what’s going on with Wyze support, but telling you to proceed as if you don’t have a C wire when you do is bad advice and support.