Temperature sensor is lame – Nest Review

The nest thermostat temperature sensor has a limited value for homeowners like myself. This sensor can’t work in tandem with your Nest thermostat, rather only one of them can control your furnace at a time. If you designate the sensor as the controlling thermostat, the other thermostat will not be considered. I bought it hoping that I could monitor a cold crawlspace to make sure that temperatures did not go below freezing. Although the sensor can report cold temperatures, it cannot command temperatures below 50°. This thermostat sensor would attempt to keep my crawlspace no lower than 50° which would mean my house would probably be at 85 or 90 degrees. Therefore, if you are looking for something that will provide freeze protection by turning on the heat in extremely cold temperatures you are out of luck with this device.
Review by yetinut on Nest.