What Generation Nest Thermostat Works With Nest Temperature Sensor?
In order to pair a Nest temperature sensor to your Nest thermostat you will need to make sure you have a compatible version that allows communication between your T-Stat and Temp sensor. Nest has an online guide to help determine what Nest thermostat you own and can be viewed here . Compatible Nest Thermostats to Work with the Nest Temperature Sensor Nest Thermostat E 3rd Gen Nest Learning Thermostat