Nest thermostat Technical Info menu

You can find more details about your Nest thermostat in the Technical Info menu such as the model, serial number, software version and other important details.

To get to the Technical Info menu on your Nest thermostat:

1. Press the thermostat ring to bring up the Quick View menu.
2. Turn the ring to Settings  and press to select.
3. Turn the ring to Technical Info and press to select.

Note: You can also see some of the same information in the nest app by tapping your thermostat on the app home screen, then selecting Settings  Technical Info.

There are a few different sections with information about your Nest thermostat's sensors,
your Wi-Fi network, your thermostat's serial and model numbers and much more. Below is a
list of what you'll see on your thermostat.

Power 

Battery

This is the current voltage of your thermostat’s internal rechargeable battery. The voltage will fluctuate, but it should be higher than 3.6V when it’s charging normally. If your thermostat isn’t receiving enough power to charge the battery and it falls below 3.6V, your thermostat will turn off Wi-Fi, delay software updates, and disable the screen to preserve the battery charge and delay shutting down completely. 3.7V is required to install a software update. 3.6V is required for the display to turn on when you approach.

Voc Vin Iin

Voc, Vin, and Iin measure the electrical current sent over your system’s wires to your thermostat. Below are the ranges that the Voc, Vin and Iin should stay in during normal operation. There are different Vin and lin values if you have a common or C wire in your thermostat: If there isn't a C wire in your thermostat: Voc: 29 to 42V Vin: 29 to 42V when your system is not running 6 to 7V when your system is running Iin: 20 to 40 mA If there is a C wire in your thermostat: Voc: 29 to 42V Vin: 29 to 42V Iin: 100 or 200 mA Troubleshooting power issues If the above power specs are outside of their normal range, you may need to troubleshoot. For instance, if your Nest thermostat won’t turn on and is unresponsive, or you see a blinking red light at the top of the thermostat’s screen, your thermostat likely isn’t getting enough power to charge its battery. For troubleshooting, please see the following article:            Troubleshooting when your thermostat won’t turn on >

Network 

Wi-Fi	Here you’ll see the name of the Wi-Fi network your thermostat is currently connected to, and the network PING (measured in milliseconds). The signal strength has a maximum value of 100. A signal strength of 75 is considered strong, while a value of 36 or lower is considered weak. You can use the signal strength to help troubleshoot offline issues with your thermostat. Try moving your Wi-Fi router or extender to see if the signal strength improved. Note: If disconnected from Wi-Fi, you’ll simply see “Client not connected.”
Security	This shows you what type of security your Wi-Fi network is using: WPA, WEP, etc.
Interface	This tells you the Nest thermostat's Wi-Fi network interface which is typically “wlan0.”
IPv4
Address	This is your Nest thermostat’s network IP address, which is assigned by your router. You can also see the the thermostat’s IP address on your Wi-Fi router’s list of connected devices.
Subnet mask	A subnet mask is used to identify the network location of an IP address. Most home networks use the default subnet mask 255.255.255.0.
Router	This is the network IP address of the router that your Nest thermostat is connected to.
IPv6
Address	This is your thermostat’s IPV6 network address, which is used for Thread communications.
Prefix length	Similar to an IPv4 Subnet Mask, an IPv6 Prefix length is used to identify the network section of an IPv6 address.
Router	This is the IPv6 address of the router that your Nest thermostat is connected to.
Name servers	This tells you the address of the Domain Name System (DNS) server and backup DNS server used by your thermostat.
Search domains	This is used if your Nest thermostat needs to resolve an unqualified domain name. If not, you will see “none.”
Service Environment	Most people will see “production.” If you are participating in the Nest Field Test program, you will see “ft.”
Last data upload	The exact date and time of your thermostat’s last automatic data upload to the Nest service. For more information, please see our privacy FAQ.
Last cloud comm	The exact date and time of your thermostat’s last communication with the Nest service. This syncs your Nest thermostat and the app so they can show you the same information.
MAC address	This is the unique network ID assigned to your Nest thermostat’s network hardware when it was manufactured.

Sensors 

Current temp	The current ambient temperature in the room determined from the Nest thermostat’s internal sensors. The temperature is also displayed on the thermostat's temperature screen.
Target temp	The temperature set on the Nest thermostat that the system system is currently trying to heat or cool to.
Rel. humidity	The relative humidity in the room measured by the Nest thermostat’s internal sensors.
Activity	This shows status information about the activity and light sensors in the Nest thermostat. Note: A sensor can be working normally and show a reading of 0.

Equipment 

Equipment sensed on

This shows which connectors on the Nest thermostat base have wires in them. This is determined by the physical position of the connector button, not by wire voltage. Troubleshooting: If the wires listed here don't match what wires are actually in the thermostat connectors, check that the wires are fully inserted and that the connector button stays down. Also check that there isn't anything (such as a broken wire end) jamming any of the connectors.

Display 

Where	The location name given to your Nest thermostat during setup. Note: You can change the name by going to Settings  Where  on the thermostat or with the app.
Software version	This shows the software currently installed on the Nest thermostat.          Nest thermostat software update history
Model	The model number of your Nest thermostat display. This varies between different models and generations of Nest thermostats.
Serial number	Your Nest thermostat’s display has a unique serial number.
Device ID	The Nest Thermostat E will list a device ID that’s unique to your display.
Unlocked	This lets you see if your Nest Thermostat E is locked or unlocked.
Time Zone	The time zone for the Nest thermostat is based on the ZIP code entered during setup.

Base

Software version	This shows the software version installed on the Nest thermostat's base. Note: If your thermostat is connected to Wi-Fi and the internet, it will automatically download the latest software.
Model	The model of your Nest thermostat base.
Serial number	Your Nest thermostat's base has a unique serial number.