Wiring A Thermostat With 2 Wires : Guide To Wiring Connections For Room Thermostats - With a c wire powering your thermostat you won't need to worry about the batteries dying and you can set the light on your thermostat to be always there were three wires coming out of the wall where my old thermostat was mounted.

Wiring A Thermostat With 2 Wires : Guide To Wiring Connections For Room Th…