Nest thermostat's technical information

If you need to find any technical information about your Nest thermostat, such as its network IP address or its software version, use the Home app or Nest app. 

This article applies to all Google Nest thermostat models.

How to tell which thermostat you have

Thermostat technical information in the Home app

Note: depending on your thermostat model and its software version, you may not be able to view all technical information listed below in the Home app. To view all technical information for the Nest Thermostat E or Nest Learning thermostat, use the Nest app or the thermostat itself.

How to tell which Nest thermostat you have

To get to the technical info for the Google Nest Thermostat, Google Nest Thermostat E, or Google Nest Learning Thermostat in the Home app:

  1. Open the Home app.
  2. On the home screen, tap your thermostat.
  3. Tap Settings .
  4. Select Device information.
Device name

This shows the name you’ve given your thermostat.

Change the device name in the Home app

Home This is the name of your home your thermostat is added to in the app.
Placement This is the place in your home that your thermostat has been assigned (such as kitchen or hallway).
Model This shows the model name of your thermostat.
Device ID Nest Thermostat only: your thermostat will list a device ID that’s unique to your display.
Serial no. Your thermostat's base has a unique serial number.
Software version

This shows the software currently installed on your thermostat.

Nest thermostat software update history

Wi-Fi MAC This is the unique network ID assigned to your thermostat’s network hardware when it was manufactured.
IP This is your thermostat’s network IP address, which is assigned by your router. You can also see the thermostat’s IP address on your Wi-Fi router’s list of connected devices.
Battery state Nest Thermostat only: This is the charge level of the replaceable AAA batteries: Unknown, OK, Low, Very low
Battery voltage This is the current voltage of your thermostat’s internal rechargeable battery.

Thermostat technical information in the Nest app

Note: The Nest app is only compatible with the Nest Thermostat E and Nest Learning Thermostat. To view technical information for the Nest Thermostat, use the Home app.

How to tell which Nest thermostat you have

To get to the technical info for the Google Nest Thermostat E or Google Nest Learning Thermostat in the Nest app:

  1. Open the Home app.
  2. On the home screen, tap your thermostat.
  3. Tap Settings Nest settings icon.
  4. Select Device information.

Note: If you have Nest Thermostat E or Nest Learning Thermostat, you can also find technical information on your thermostat. From the quick view menu, go to Settings Nest settings icon  Technical Info.

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

This is where the name and signal strength of the Wi-Fi network your thermostat is connected to will appear. The ping (measured in milliseconds) may also appear.

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 network addresses
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 network addresses
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 measured by 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.

Note: 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 your thermostat’s settings.

Change the location or room name of your Nest product in the Nest 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.

Nest app Technical info

Display model

This shows the model number of your thermostat display. This varies between different models and generations of thermostats.

Where

This is the location name given to your thermostat during setup.

Note: You can change the name by going to your thermostat’s settings.

Change the location or room name of your Nest product in the Nest app

Backplate model The model of your Nest thermostat base.
Serial number Your thermostat’s display has a unique serial number.
Software

This shows the software currently installed on the Nest thermostat.

Nest thermostat software update history

MAC This is the unique network ID assigned to your Nest thermostat’s network hardware when it was manufactured.
IP 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.
 
Last contact The date and time of your thermostat’s last communication with the Nest service.
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.
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