Which Nest Thermostat Do I Have? An In-Depth Guide for Small Businesses

As a consultant who advises small business owners on optimizing operations, one question I‘m often asked is "Which Nest thermostat model do I have?" Identifying your specific Nest device is crucial for properly using its features, integrating with other systems, and troubleshooting issues. With Nest releasing new generations over the years, it can get confusing.

In this comprehensive guide, I‘ll use my expertise to break down the key differences between Nest thermostat models and provide small business owners clear steps to identify which one they have installed.

Demystifying Nest‘s Model Numbering System

Nest uses a simple X.Y model numbering format. The first digit "X" indicates the thermostat generation:

  • 1st generation models – 1.x
  • 2nd generation models – 2.x
  • 3rd generation models – 3.x

The second digit "Y" indicates minor iterations within the generation. For example, the first generation had models 1.0 and 1.1.

Nest also uses distinct model numbers starting with "T" for its low-cost Nest Thermostat E line.

So if you have a model number 3.5, that indicates a 3rd generation Nest Learning Thermostat. And T3007ES represents a Nest Thermostat E. Understanding the numbering convention helps decipher your model.

A Picture is Worth a Thousand Words – Nest Display Differences

In addition to model numbers, the actual display design indicates which generation you have:

First and Second Generation Nest Displays

First and Second Generation Nest Displays – Image Credit: Nest

The first two generations have a distinct circular stainless steel ring with a round screen in the middle. The second generation‘s ring is a bit thinner.

Third Generation Nest Display

Third Generation Nest Display – Image Credit: Nest

The third generation has a sharp-edged rectangular display and slim side bezels for a sleek, modern look.

Finally, the Nest Thermostat E has a plastic body and frosted display encircled by a white frame:

Nest Thermostat E Display

Nest Thermostat E Display – Image Credit: Nest

By examining the thermostat itself, you can quickly identify generations based on display design.

Comparing Features Across Nest Models

Each Nest thermostat generation has its own capabilities to be aware of:

Feature 1st & 2nd Gen 3rd Gen Nest Thermostat E
Display Round 320×320 resolution Rectangular 480×480 resolution Frosted display
Learning capabilities Yes Enhanced learning features Basic learning
Humidity monitoring No Yes No
Remote temperature sensors No Supports up to 18 sensors No
Smart home integration Basic Works with Alexa, Google Assistant, IFTTT Basic integration
Maximum number of zones 1 Up to 3 1

As you can see, newer generations gain more advanced features, connectivity, and intelligence. Checking your thermostat‘s capabilities against this table can help identity the model.

Step-by-Step Troubleshooting Guide

Nest thermostats are advanced devices, but they can still run into problems. Using my experience supporting small business clients, here is a troubleshooting methodology to resolve common Nest issues:

Connectivity Problems

If your Nest thermostat won‘t connect to WiFi:

  1. Power cycle your WiFi router and modem (unplug, wait 30 seconds, plug back in).
  2. Use the Nest app to run detailed network diagnostics.
  3. Try moving your WiFi router closer to the thermostat.
  4. Factory reset your thermostat as a last resort.

Inaccurate Temperature Readings

If your Nest is showing the wrong temperature:

  1. Make sure it is located away from vents, drafts, windows, and sources of heat/cold.
  2. Change the thermostat to a new spot on the wall at least 1 foot from other objects.
  3. Look for wiring issues or a loose baseplate connection.
  4. Adjust the temperature offset in settings if readings are consistently off.

Unresponsive to Setting Changes

If your thermostat ignores your settings, first ensure:

  • It is set to the correct mode – heating, cooling, or auto.
  • The target temperature is significantly different from the current temp.


  1. Perform a manual reset of the thermostat using the direct on-device interface.
  2. If the issue persists, factory reset the device through the settings menu.

Frozen Screen, Crashes, or Blank Display

For freeze-ups, crashes, or blank screens:

  1. Perform a manual reset by holding down the center button for 10+ seconds until it resets.
  2. If needed, carefully use a paperclip to press the small physical reset button on the thermostat‘s baseplate.
  3. As a last resort, you can factory reset the device through the Nest app.

Following structured troubleshooting tailored to your specific Nest model can efficiently resolve problems.

Resetting Your Thermostat

If you‘ve tried troubleshooting and your Nest still has issues, resetting the device to factory default settings often helps:

Soft Reset

  • In the Nest app, go to Settings > Reset > Restart
  • On the device, hold down the center button for 10+ seconds

Hard Reset

  • In the app, go to Settings > Reset > Factory Reset
  • On the device, hold down the center button for 20+ seconds
  • Insert a pin in the back panel reset button

Resetting clears out bugs, bad configurations, and gives your Nest a fresh start. I advise clients to note their settings before resetting.

Key Takeaways

I hope this comprehensive guide provides small business owners clear guidance on identifying their Nest thermostat model and properly troubleshooting issues. Here are the key insights to take away:

  • Learn the model numbering scheme – the first digit indicates the generation.
  • Check the display design and appearance for quick visual identification.
  • Compare features across models to match your thermostat‘s capabilities.
  • Follow structured troubleshooting steps specific to your Nest model.
  • Reset your thermostat properly when needed – soft reset first, then hard reset.

Let me know if you have any other questions! I‘m always happy to share my expertise to help small business owners optimize operations.