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![Nest Thermostat Wire Colors [Explained] - YouTube](https://i.ytimg.com/vi/6uIobT86FdU/maxresdefault.jpg "Nest Thermostat Wire Colors [Explained] - YouTube")
Nest Thermostat Wire Colors [Explained] - YouTube
No C-wire? Install a Nest thermostat at your own risk – Smart Thermostat Guide
