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Repair Windows errors before they cause bigger problemsFix Now →Scan for outdated or missing drivers - takes under a minuteDriver Scan →Google ended software and app support on October 25, 2025, for three early Nest Learning Thermostats: the 1st-generation model from 2011, the 2nd-generation model from 2012, and the European 2nd-generation version introduced in 2014. The thermostats were not necessarily disabled as heating and cooling controls, but their connected features—including app control, remote access, notifications, Google Assistant, Home/Away Assist, and Nest Protect emergency shutoff—are no longer available. Existing local schedules and on-device controls may continue to work, but Google no longer provides software or security updates.
Which Nest thermostats lost support?
| Model | Original release | Status |
|---|---|---|
| Nest Learning Thermostat, 1st generation | 2011 | Support ended October 25, 2025 |
| Nest Learning Thermostat, 2nd generation | 2012 | Support ended October 25, 2025 |
| Nest Learning Thermostat, 2nd-generation European version | 2014 | Support ended October 25, 2025 |
This announcement does not mean that every older product carrying the Nest name is affected. The official notice specifically identifies these three early Nest Learning Thermostat models. It does not include the 3rd-generation Learning Thermostat or Nest Thermostat E in this particular end-of-support announcement.
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Google’s support guidance explains the affected models, the discontinued features, and the functions that remain available locally.
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What stopped working after October 25, 2025?
The important distinction is between the thermostat’s cloud-connected functions and its local HVAC controls.
#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]
Connected features that ended
- Connection to the Google Nest and Google Home apps.
- Remote temperature adjustments and status checks from a phone or tablet.
- Notifications.
- Google Assistant control.
- Home/Away Assist.
- Multi-device Eco mode control.
- The connection between the affected thermostat and Nest Protect.
- Future software and security updates.
Google says affected thermostats were unpaired from, or removed from, the Nest and Home apps beginning October 25, 2025. A device that still appears in an account, shows cached information, reports diagnostic logs, or displays a connection status should not be treated as fully supported.
The thermostat may show “None” or “Connected” after unpairing. That on-device status does not restore remote app control.
What still works?
Google says owners can continue controlling affected thermostats directly from the device. Depending on the installation and the thermostat’s condition, this includes:
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- Switching between available heating and cooling modes.
- Adjusting on-device settings.
- Managing auto-schedule settings.
- Running existing thermostat schedules.
In practical terms, an old thermostat may still turn the heating or air conditioning on and off locally. It did not necessarily become physically unusable on the support-ending date.
That continued operation is not a promise of indefinite reliability. A future hardware fault, power problem, Wi-Fi change, or HVAC issue will be occurring on a device that no longer receives software fixes or security updates. A factory reset or attempt to configure replacement Wi-Fi may also create problems without restoring app functionality, so do not reset the thermostat as a general troubleshooting step.
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
What happens to schedules?
Google says preset schedules continue to operate and that auto-schedule settings can still be managed on the thermostat itself. Existing thermostat scheduling should therefore continue locally.
Cloud-based automations are different. Do not assume that every automation created through an app, Google Assistant, Home/Away Assist, or multi-device Eco control will continue in the same way. The safest expectation is that the thermostat’s existing on-device schedule remains available while app-dependent features do not.
Nest Protect warning: emergency shutoff is gone
Affected thermostats disconnect from Nest Protect. Google specifically says the thermostat-linked emergency shutoff function will no longer run.
This does not mean that Nest Protect necessarily stops detecting smoke or carbon monoxide on its own. The documented change is the loss of its connection to the affected thermostat and the related emergency-shutoff behavior. If your safety plan depended on that connection, review the setup rather than assuming the old protection remains active.
How to identify your thermostat
Do not rely only on the faceplate or overall appearance. Used devices may have replacement displays, aftermarket trim, or regional differences that make visual identification unreliable.
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
- Check the thermostat’s device information and look for its model and serial number.
- Review the device listing in your Nest or Google account, if the device is still shown there.
- Check the software version and other device details in the available Nest or Google Home menus.
- Confirm that it is a Learning Thermostat, not the later low-cost Nest Thermostat or Nest Thermostat E.
Google’s identification and support information is available at support.google.com/googlehome/answer/16233096.
Should you keep using the old thermostat?
Keeping it may be reasonable when local control and scheduling still work, the HVAC system is straightforward, and you do not need remote control, notifications, voice commands, or thermostat-linked Nest Protect behavior.
Replacement is more compelling when you need to monitor a vacant property remotely, control temperatures from your phone, receive alerts, use room sensors, or avoid relying on unsupported equipment. It is also sensible to plan ahead if the old thermostat is already showing wiring, power, display, or HVAC-control problems.
Do not buy an affected 1st- or 2nd-generation Learning Thermostat as a cheap “smart thermostat.” It may function locally, but it no longer offers the cloud features and support that justified buying a connected model.
Current Google replacement options in the U.S.
| Model | U.S. list price cited by Google | Best suited to | Key limitations |
|---|---|---|---|
| Nest Learning Thermostat (4th gen.) | $279.99 | Owners wanting learning schedules, room sensing, broader HVAC compatibility, and Matter support | Higher price; requires Google Home for setup; compatibility must be checked |
| Nest Thermostat | $129.99 | Owners wanting lower-cost Google Home control and guided scheduling | No Nest Temperature Sensor support; does not automatically learn schedules; Google says it works with approximately 85% of HVAC systems |
Prices above are U.S. Google Store prices cited in the supplied product information and can change. European and Canadian availability, pricing, wiring, and HVAC practices may differ.
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].
Nest Learning Thermostat (4th gen.)
The 4th-generation Learning Thermostat is the closest modern Nest successor for owners who want a rotating physical thermostat, automatic schedule learning, room-temperature sensing, and more extensive HVAC support. Google lists support for most 24-volt systems, including gas, electric, oil, forced-air, heat-pump, and radiant systems. Compatible installations may support up to three heating stages, three cooling stages, humidification, dehumidification, and ventilation.
Google says the package includes one 2nd-generation Nest Temperature Sensor and that the thermostat works with Google Home, Matter-enabled apps, and voice assistants. It is designed to work without a C wire in most homes, although a C wire or Nest Power Connector may be required in limited cases.
See the product page and technical specifications.
Nest Thermostat
The standard Nest Thermostat costs less and is suitable for a relatively conventional HVAC installation where guided scheduling is enough. It uses the Google Home app and supports remote control, but it does not support the Nest Temperature Sensor and does not automatically learn a schedule in the same way as the Learning Thermostat.
Google’s comparison material states that it works with approximately 85% of HVAC systems. Some heating-only, cooling-only, zone-controlled, and heat-pump systems may need a C wire or Nest Power Connector. Check compatibility before purchase.
See Google’s Nest Thermostat product page and specifications.
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
Check HVAC compatibility before removing anything
Use Google’s compatibility checker before buying or disconnecting a replacement. Compatibility deserves extra attention for:
- Heat pumps and auxiliary or emergency heat.
- Dual-fuel systems.
- Zoned HVAC systems.
- Systems with multiple heating or cooling stages.
- Humidifiers, dehumidifiers, and ventilation equipment.
- Unusual wiring or systems without a conventional 24-volt setup.
Photograph the existing wiring and label each wire before disconnecting the old thermostat. Turn off power to the HVAC equipment first. High-voltage wiring, complex zoning, dual-fuel systems, and auxiliary equipment should be handled by a qualified HVAC professional rather than treated as a universal DIY installation.
What happened to Google’s replacement discount?
Google offered eligible owners in the United States and Canada a discounted 4th-generation Learning Thermostat: $149.99 in the U.S. or CA$219.99 in Canada. The offer used unique promotional links and expired on December 31, 2025. It is not a current 2026 purchasing route.
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Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →Eligibility could vary by home and by the number of affected thermostats. Google also said eligible users with multiple homes received separate emails and promotional codes by home. For current buying decisions, use the regular product pages and confirm compatibility instead of relying on reports about the expired discount.
Bottom line for homeowners and contractors
The early Nest Learning Thermostats were not simply switched off. Their local thermostat functions and existing on-device schedules may continue, but their smart-home value has largely ended: no supported Nest or Google Home app connection, remote access, notifications, Assistant control, Home/Away Assist, or thermostat-linked Nest Protect emergency shutoff.
If local control is sufficient, you can continue using the device while planning for eventual replacement. If remote management or connected safety behavior is important, replace it with a compatible current thermostat—most directly the Nest Learning Thermostat (4th gen.) or, for simpler systems and a lower price, the standard Nest Thermostat. Always check the HVAC configuration before installation.
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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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