Google ended support on October 25, 2025, for the first- and second-generation Nest Learning Thermostats, including the European second-generation model. The thermostats were not remotely disabled: local temperature controls and schedules stored on the device can continue to work. However, Google Home and Nest app control, remote access, Google Assistant commands, notifications, connected features, and future software and security updates are no longer available.
Which Nest thermostats lost support?
Google’s announcement applies specifically to these early Nest Learning Thermostats:
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A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11| Model | Release detail | Affected? |
|---|---|---|
| Nest Learning Thermostat, 1st generation | 2011 | Yes |
| Nest Learning Thermostat, 2nd generation | 2012 | Yes |
| Nest Learning Thermostat, 2nd-generation European version | 2014 | Yes |
| Nest Learning Thermostat, 3rd generation | 2015 | No change under this announcement |
| Nest Learning Thermostat, European 3rd generation | 2015 | No change under this announcement |
| Nest Thermostat E | 2017; European version in 2018 | No change under this announcement |
| Nest Thermostat | 2020 | No change under this announcement |
| Nest Learning Thermostat, 4th generation | 2024 | No change under this announcement |
That distinction matters. “Original Nest thermostat” is often used broadly, but Google did not end support for every older-looking Nest product. The company’s announcement covered the first- and second-generation Learning Thermostats only. See Google’s model list and announcement.
#1 Best Overall
- ENERGY STAR certified smart thermostat for home that helps you save energy and stay comfortable.Connectivity : Wi-Fi - 802.11b/g/n 2.4 GHz, 802.11a/n 5 GHz Wi-Fi., Wireless interconnect : Bluetooth Low Energy Please refer to the product description section below for all applicable legal disclaimers.Product note: You can also check your system’s compatibility before purchasing a Nest thermostat with our online Nest Compatibility Checker on the Google Nest support page
- The Nest Thermostat is designed to work without a C wire in most homes, but for some systems, including heating only, cooling only, zone controlled, and heat pump systems, you’ll need a C wire or other compatible power accessory
- Nest Thermostat turns itself down when you leave, so you don’t waste energy heating or cooling an empty home. Lock feature: No
- Programmable thermostat that lets you create an energy efficient schedule in the Google Home app on your Android or iPhone
- Remote control lets family members change the thermostat temperature from anywhere on a phone, laptop, or tablet[1]
What stopped working after October 25, 2025?
The cutoff was an end of software, cloud, and app support—not an immediate power cutoff or product recall. Affected thermostats should no longer be treated as supported smart-home devices.
- Control through the Nest app and Google Home app.
- Remote temperature changes and status checks from a phone or tablet.
- Google Assistant voice control.
- Notifications.
- Cloud-based Home/Away Assist.
- Multi-device Eco mode control.
- Connected features involving Nest Protect.
- Future software and security updates.
Google notes that a thermostat may display a connection status such as “None,” or in some circumstances still say “Connected” after being unpaired. That status is not proof that app control remains available. The full list of affected features is in Google’s support documentation.
What still works?
The thermostat can still provide basic local HVAC control. Owners can generally use the device itself to:
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- Switch among available heating, cooling, and other system modes.
- Adjust settings on the thermostat.
- Manage or modify auto-schedule settings.
- Continue using preset schedules already stored on the device.
Google says existing schedules continue to work uninterrupted. Nevertheless, cloud-connected automation should not be treated as guaranteed. The most accurate description is that an affected Nest has become a locally controlled, programmable thermostat rather than a fully supported smart thermostat.
Rank #2
- Nest’s smartest, most advanced thermostat yet, the Google Nest Learning Thermostat (4th gen) is a beautiful, brilliant way to save energy, keep your home comfortable, and help make sure your heating and cooling systems are running smoothly[4]
- Savings you can count on: The Nest Learning Thermostat can help save up to 31% on heating and cooling bills[2]
- Improved compatibility: It works with most 24V systems, including gas, electric, oil, forced air, heat pump, and radiant, and no C wire is required for installation in most homes; visit the Nest Compatibility Checker for more info[5]
- Easy control in the Google Home app: Adjust on your phone from anywhere[1] or by using your voice with Alexa, Siri, or Google Assistant smart speaker[3], it’s easy to install yourself and it’s Matter compatible for simple integration into your smart home[5]
- Beautiful design: With a 60% larger display[11] and Dynamic Farsight, you can see info from across the room[1]; choose the design, like a clock or the weather; it automatically adjusts brightness for the best readability or you can adjust manually
Important safety issue: Nest Protect integration
This change is more significant than losing app convenience for households that use Nest Protect with the thermostat. Google says affected thermostats will disconnect from Nest Protect, and the thermostat-related emergency shutoff function will no longer run.
That does not mean Google declared every affected thermostat a fire hazard. The official announcement concerns support and connectivity. The practical issue is that the devices no longer receive updates, and a connected safety function has been removed. If your HVAC safety plan relies on Nest Protect’s thermostat emergency shutoff behavior, arrange an appropriate replacement or consult a qualified HVAC professional rather than assuming the old integration still works.
How to identify your thermostat
- Check the thermostat’s information menus for its model, serial number, and software version.
- If it remains listed, inspect the device in the Nest or Google Home app.
- Compare the model and generation with Google’s support page before buying a replacement.
- Photograph the thermostat and wiring, and record every terminal label before removing it.
Do not identify the model solely by its round shape or metal finish. Several later Nest products look similar but are not included in this support transition.
Should you keep using it or replace it?
Keep it temporarily if:
- You need only manual temperature adjustments and a stored schedule.
- The HVAC system is operating reliably.
- You do not need remote access, notifications, or voice control.
- You are prepared for the possibility that a future hardware or local-software failure may have no official recovery path.
Replace it if:
- You need to control the system while away from home.
- You rely on alerts or Google Assistant.
- You use Home/Away Assist or other cloud automation.
- Your household depends on the Nest Protect emergency-shutoff integration.
- You want current security updates and manufacturer support.
Leaving the thermostat installed does not mean Google will remotely brick every unit. It may continue regulating temperature locally. The trade-off is that the smart features and support infrastructure many owners purchased it for are gone.
Rank #3
- Nest’s smartest, most advanced thermostat yet, the Google Nest Learning Thermostat (4th gen) is a beautiful, brilliant way to save energy, keep your home comfortable, and help make sure your heating and cooling systems are running smoothly[4]
- Savings you can count on: The Nest Learning Thermostat can help save up to 31% on heating and cooling bills [2]
- Improved compatibility: It works with most 24V systems, including gas, electric, oil, forced air, heat pump, and radiant, and no C wire is required for installation in most homes; visit the Nest Compatibility Checker for more info[5]
- Easy control in the Google Home app: Adjust on your phone from anywhere[1] or by using your voice with Alexa, Siri, or Google Assistant smart speaker[3], it’s easy to install yourself and it’s Matter compatible for simple integration into your smart home[5]
- Beautiful design: With a 60% larger display[11] and Dynamic Farsight, you can see info from across the room[1]; choose the design, like a clock or the weather; it automatically adjusts brightness for the best readability or you can adjust manually
Google’s replacement offer has expired
Google offered eligible owners in the United States and Canada a discounted fourth-generation Nest Learning Thermostat for $149.99 in the U.S. or CA$219.99 in Canada. It was a limited offer, not a universal rebate, and the stated deadline was December 31, 2025.
As of August 2026, that promotional offer should not be presented as current. Check the live Google Store listing for current availability and pricing.
Replacement compatibility is not automatic
A new thermostat may not be a direct drop-in replacement. Compatibility depends on the HVAC equipment, wiring, region, and controls installed in the home.
Before purchasing, check:
- Whether the system is conventional, a heat pump, or dual-fuel.
- The number of heating and cooling stages.
- Whether the home has a C wire.
- Whether a Nest Power Connector is required.
- Humidifier, dehumidifier, ventilator, or accessory controls.
- Zoned systems and other specialized equipment.
- Whether the replacement supports the system’s voltage and terminal configuration.
Google says the standard Nest Thermostat works with about 85% of systems, but some heating-only, cooling-only, zone-controlled, and heat-pump installations may need a C wire or Nest Power Connector. Use Google’s compatibility information and the fourth-generation Learning Thermostat specifications before ordering.
Rank #4
- ENERGY STAR certified smart thermostat for home that helps you save energy and stay comfortable.Control the temperature with your voice using smart home devices that work with Google Assistant or Alexa[3]Nest Renew makes it simple to support clean energy right from home; it works with your Nest Thermostat[5] to help you automatically prioritize your usage[6] to times when energy is cleaner or less expensive.Product note: You can also check your system’s compatibility before purchasing a Nest thermostat with our online Nest Compatibility Checker on the Google Nest support page
- The Nest Thermostat is designed to work without a C wire in most homes, but for some systems, including heating only, cooling only, zone controlled, and heat pump systems, you’ll need a C wire or other compatible power accessory. You can control your Nest Thermostat manually when there's no internet connection.
- Nest Thermostat turns itself down when you leave, so you don’t waste energy heating or cooling an empty home
- Programmable thermostat that lets you create an energy efficient schedule in the Google Home app on your Android or iPhone
- Remote control lets family members change the thermostat temperature from anywhere on a phone, laptop, or tablet[1]. | Control the temperature with your voice using smart home devices that work with Google Assistant or Alexa[3].
For heat pumps, dual-fuel systems, multi-stage equipment, zoning, accessory controls, unclear wiring, or any installation involving safety concerns, hire a qualified HVAC professional. Turn off power and follow the manufacturer’s installation instructions; do not assume that matching wire colors is sufficient.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Replacement paths in 2026
Fourth-generation Nest Learning Thermostat
This is the most direct path for homeowners who want to remain in Google Home. Google lists support for Google Home, Matter-compatible smart-home apps, and optional Nest Temperature Sensors—up to six sensors per thermostat according to its product page. Compatibility still must be checked, and buying another cloud-connected product means accepting the possibility of future service changes.
Google’s published security documentation lists the fourth-generation model through August 20, 2029. That is a published minimum security-support date, not a promise that every app or cloud feature will remain unchanged until then. See Google’s security-support information.
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1Repair Windows errors before they cause bigger problems2Fix the driver behind crashes, sound loss and screen glitches3Clear out junk files and repair common Windows errorsStandard Nest Thermostat
The standard Nest Thermostat is a simpler Google Home option for buyers who want remote control and scheduling without the full Learning Thermostat feature set. Its compatibility is more limited, so it is a poor assumption for heating-only, cooling-only, zone-controlled, or certain heat-pump systems without checking first.
Best Value
- ENERGY STAR certified smart thermostat for home that helps you save energy and stay comfortable.Product note: You can also check your system’s compatibility before purchasing a Nest thermostat with our online Nest Compatibility Checker on the Google Nest support page.Connectivity Protocol : Wi-Fi.Connectivity Protocol : Wi-Fi
- The Nest Thermostat is designed to work without a C wire in most homes, but for some systems, including heating only, cooling only, zone controlled, and heat pump systems, you’ll need a C wire or other compatible power accessory. Lock feature: No
- Nest Thermostat turns itself down when you leave, so you don’t waste energy heating or cooling an empty home; easily program an energy efficient schedule in the Google home app on your Android or iPhone
- Remote control lets family members change the thermostat temperature from anywhere on a phone, laptop, or tablet[1]
- Savings Finder looks for more ways your thermostat can help you save, and suggests tweaks to your schedule in the app; check with your energy provider to learn more about rebates and more ways to save on a Nest thermostat
ecobee
ecobee’s Smart Thermostat Premium, Enhanced, and Essential provide an alternative ecosystem with room-sensor options and integrations that can suit Alexa- or Apple-oriented homes. Product features vary by model. ecobee also notes that some smoke-alarm detection features require compatible hardware and a Smart Security subscription. Start with the ecobee thermostat range, then verify the specific model’s HVAC compatibility.
Emerson Sensi, Honeywell Home, or a conventional programmable thermostat
These options may appeal to homeowners who want simpler controls, a different manufacturer, or less dependence on one cloud ecosystem. Sensi, Honeywell Home, and other products still require model-specific wiring and HVAC checks. Utility-qualified product lists can show the breadth of available alternatives, but they are not live retail catalogs or universal compatibility guides; for example, see Oncor’s qualified-products list.
What about third-party revival projects?
Community and open-source projects are attempting to replace cloud functionality for discontinued Nest hardware. One reported example is No Longer Evil Thermostat.
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Such projects are not official Google-supported solutions. They may require technical installation, may not support every HVAC configuration or Nest feature, and may introduce security, privacy, electrical, warranty, or reliability risks. They can also fail after future firmware, app, or infrastructure changes. Do not use an unverified project as the sole basis for disabling or replacing a required HVAC safety system.
The practical lesson for a thermostat replacement
The end of support shows the difference between physical operation and smart-home support. A thermostat can continue switching HVAC equipment locally while losing the cloud services that provide remote control, automation, alerts, and integrations.
Choose a replacement based first on HVAC compatibility and required safety functions, then on app features, voice platforms, room sensors, interoperability, subscriptions, cost, and the manufacturer’s published support commitments. A compatibility check and, where necessary, professional installation are more important than choosing the most expensive model.
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Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
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