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Google officially ends support for older Nest thermostats by removing three early Nest Learning Thermostat models from the Nest and Google Home apps. Since October 25, 2025, owners can still adjust an affected thermostat at the wall and use preset schedules, but app control, remote access, notifications, assistants, and security updates no longer work.
The shutdown affects the Nest Learning Thermostat 1st gen, 2nd gen, and 2nd gen Europe version. Google did not announce the end of every older Nest thermostat, so identifying the exact model is the first step.
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Key takeaways
- Google ended support on October 25, 2025, for the Nest Learning Thermostat 1st gen, 2nd gen, and 2nd gen Europe version.
- Affected thermostats still work from the wall and continue running preset schedules, but app control, remote access, notifications, and connected services are gone.
- The old thermostat no longer receives software or security updates, so continued use is possible but increasingly unsupported.
- Google’s documented replacement offer was time-limited and expired on December 31, 2025; current replacement pricing and availability require a fresh check.
- A replacement thermostat must be checked against the home’s voltage, wiring, HVAC equipment, and power requirements before purchase or installation.
What does Google officially ending support for older Nest thermostats mean?
Google officially ends support for older Nest thermostats by removing three early Nest Learning Thermostat models from the Nest and Google Home apps. Since October 25, 2025, owners can still adjust an affected thermostat at the wall and use preset schedules, but app control, remote access, notifications, assistants, and security updates no longer work.
Google’s official notice says, “Your thermostat will no longer connect to or work in the Google Nest app or Google Home app starting on October 25, 2025.” The announcement applies to specific first- and second-generation Learning Thermostats, not every older-looking Nest thermostat.
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- 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
Which Nest thermostats lost support on October 25, 2025?
Google ended support for three early models: the Nest Learning Thermostat 1st gen, launched in 2011; the Nest Learning Thermostat 2nd gen, launched in 2012; and the Nest Learning Thermostat 2nd gen Europe version, introduced in 2014. Google lists these models in its end-of-support announcement.
| Model | Google-listed year | Support status after October 25, 2025 |
|---|---|---|
| Nest Learning Thermostat 1st gen | 2011 | Removed from the apps; local controls remain |
| Nest Learning Thermostat 2nd gen | 2012 | Removed from the apps; local controls remain |
| Nest Learning Thermostat 2nd gen Europe version | 2014 | Removed from the apps; local controls remain |
The cutoff date has already passed. If an older Nest thermostat disappeared from the Nest or Google Home app around that date, the disappearance is consistent with Google’s announced shutdown rather than necessarily indicating a Wi-Fi or wiring fault.
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1Fix the driver behind crashes, sound loss and screen glitches2Repair Windows errors before they cause bigger problems3Scan for outdated or missing drivers - takes under a minuteWhat stopped working on an affected Nest thermostat?
The cloud-connected functions stopped working when Google unpaired the affected thermostats and removed them from the Nest and Google Home apps. Owners lost the following capabilities:
- Checking thermostat status in the Nest or Google Home app.
- Changing temperature or other settings from a phone or tablet.
- Controlling the thermostat remotely.
- Receiving thermostat notifications.
- Using third-party voice assistants to control the thermostat.
- Home/Away Assist.
- Controlling multiple thermostats through Eco mode.
- The Nest Protect connection, including the emergency shutoff function.
The change is best understood as a loss of connected control, not an immediate loss of heating or cooling. Google says the thermostat can still be controlled directly at the device, and the thermostat’s preset schedules continue to operate.
Can you still use an old Nest thermostat without the app?
Yes. An affected Nest thermostat can still be operated manually at the wall, and preset schedules can continue running without the Nest or Google Home app. Google says owners can also manage auto-schedule settings, change temperature modes, and use other settings that remain available on the device.
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- 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
Manual operation may be adequate for a property where occupants are usually present and do not need remote adjustments. Manual operation is less convenient for a construction site, rental property, vacation home, or household that relies on preheating, away notifications, voice control, or remote temperature checks.
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Should you replace an unsupported Nest thermostat immediately?
No. Replacement is not necessarily an emergency if the thermostat heats and cools the property reliably, manual controls are acceptable, and preset schedules meet the household’s needs. Replacement becomes more compelling when app control, remote access, notifications, smart-home integration, or ongoing updates are important.
| Choice | What you retain | What you give up or add | Best fit |
|---|---|---|---|
| Keep the affected thermostat | Wall controls, temperature modes, auto-schedule settings, and preset schedules | No app control, remote access, notifications, connected assistants, or security updates | Owners comfortable with local operation |
| Replace with a supported thermostat | App and connected control, subject to compatibility and account setup | Hardware cost, installation work, and possible power or wiring changes | Owners who need remote or smart-home features |
| Use a qualified HVAC professional | A compatibility review and safer installation for complex systems | Professional service cost and scheduling | Dual-fuel, dual-transformer, multi-stage, or unfamiliar wiring |
How can you tell which Nest thermostat you have?
Identify the thermostat before buying a display, base, replacement, or wiring accessory. Google’s thermostat identification guide uses the display, ring, base, and app information to distinguish models and generations.
- The 1st- and 2nd-generation Learning Thermostats have small 1.8-inch displays.
- The 2nd-generation model has a stainless-steel ring; the 1st-generation model has a seam on its stainless-steel ring.
- The 2nd-generation base has 10 wire connectors and a rectangular display connector.
- The 1st-generation base has 8 wire connectors and screw holes on the left and right.
- The 3rd-generation base has 10 wire connectors.
- The 4th-generation base has 12 wire connectors arranged in straight rows.
Do not identify a thermostat by appearance alone when ordering parts. Google warns that displays and bases are not interchangeable across different models. Parts should be swapped only when they come from the same model, generation, and country or region. Mixing incompatible parts can damage the thermostat and the HVAC system.
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- 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 is the most direct replacement for an unsupported Nest thermostat?
The most direct current-generation replacement to investigate is the Google Nest Learning Thermostat (4th gen). Google announced the fourth-generation model on August 6, 2024, with a larger display, improved energy-saving features, HVAC-health monitoring, Google Home control, Matter certification, and a redesigned second-generation Nest Temperature Sensor included in the box. Read Google’s 4th-generation product announcement for the documented feature set.
The 4th-generation Nest Learning Thermostat is not guaranteed to be a drop-in replacement. Check HVAC compatibility before buying, especially if the existing installation has unusual wiring, more than one transformer, multiple heating or cooling stages, or accessories connected to the system.
| Replacement consideration | What the research establishes | What you must verify |
|---|---|---|
| Connected control | The 4th-generation model supports Google Home control | Account setup, network access, and current software support |
| Smart-home interoperability | Google describes the model as Matter certified | Compatibility with the specific smart-home platform and devices |
| Room sensing | A redesigned 2nd-generation Nest Temperature Sensor is included | Whether room-by-room sensing meets your comfort goals |
| Power and wiring | Compatibility depends on the HVAC system and available power | Voltage, terminals, C-wire needs, stages, transformers, and accessories |
What did Google’s replacement offer cost?
Google offered eligible owners in the United States and Canada a Nest Learning Thermostat (4th gen) for $149.99 in the U.S. or CA$219.99 in Canada. Google described the offer as nearly 50% off, but the documented offer expired on December 31, 2025, so those figures are not current-price promises.
Google announced a U.S. launch price of $279.99 for the 4th-generation Nest Learning Thermostat in 2024. Google also announced launch pricing of $39.99 for one additional 2nd-generation Nest Temperature Sensor or $99.99 for a three-pack. Those are historical launch prices, not current retail prices. Check Google or an authorized retailer for current price, stock, and eligibility.
If you did not receive the documented offer, Google Support is the appropriate place to ask about any current assistance. Do not assume that a replacement credit, discount, trade-in value, or retailer take-back program remains available.
Will a new Nest thermostat work with your HVAC system?
A replacement Nest thermostat is most likely to be suitable for a conventional 24-volt HVAC system, but compatibility depends on the complete installation rather than the thermostat’s age. Google says Nest thermostats are designed to work with most 24-volt systems and common fuel types including natural gas, oil, and electricity. Use Google’s Nest thermostat compatibility guide before purchasing.
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- Professional installation Recommended! Advanced Compatibility & Performance: Works with most 24V systems, including gas, electric, oil, forced air, heat pump, radiant heating, dual-fuel systems, geothermal systems, and zoned HVAC systems, with professional calibration for maximum efficiency.
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- Enhanced Energy-Saving Features: Includes the Nest Temperature Sensor for precise room-based temperature control, with professional tuning to minimize energy waste and adapt to your specific system needs.
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Systems that are incompatible or need special handling can include:
- High-voltage systems commonly marked 120 V or 240 V.
- Millivolt heaters, including some wall and floor heaters.
- Proprietary systems with nonstandard terminal labels.
- Some solid-fuel systems.
- Systems that cannot provide enough power.
- Some international or specialized systems.
- Some systems with unusually complex heating or cooling stages.
Have a qualified HVAC professional check the installation before replacing the thermostat if the system is dual-fuel, has dual transformers or more than one R wire, includes a whole-home humidifier or dehumidifier, or has unfamiliar wiring. Google recommends professional installation for these and other advanced configurations and warns that an incorrect choice on a dual-fuel system can damage the equipment.
Do you need a C wire or Nest Power Connector?
You may need a C wire or a Nest Power Connector when a supported replacement thermostat cannot receive a stable, continuous power supply from the HVAC system. Google says the Nest Power Connector can provide stable power when the system lacks a C wire or cannot deliver enough consistent power.
The Nest Power Connector is compatible, according to Google, with the Nest Thermostat, Nest Thermostat E, Nest Learning Thermostat 3rd gen, and Nest Learning Thermostat 4th gen. The official Nest Power Connector guidance also warns that some third-party C-wire adapters can cause problems or damage a Nest thermostat even when the adapters claim compatibility.
The Nest Power Connector does not restore app access or cloud support to an affected 1st- or 2nd-generation Learning Thermostat. The accessory is an installation solution for supported replacement models, not a workaround for Google’s shutdown.
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- 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 should you do with the old thermostat?
You can retain the old thermostat for local operation if it remains reliable and you understand that it is unsupported. If you sell or pass it on, describe accurately that the affected model no longer connects to the Nest or Google Home apps and no longer receives software or security updates.
Google says owners can request a postage-paid shipping label from its third-party recycling partner. The documented research does not establish a current cash trade-in value, replacement credit, or guaranteed retailer take-back program, so do not treat recycling as a guaranteed payment or discount.
A practical replacement checklist
- Identify the model and generation. Compare the display, ring, base, and connector details with Google’s identification guide.
- Record the existing wiring. Photograph the terminals and label the wires before disconnecting anything. Do not rely on wire colors alone.
- Check the system type. Confirm whether the system is 24-volt, high-voltage, millivolt, proprietary, dual-fuel, dual-transformer, multi-stage, or connected to humidity equipment.
- Run the official compatibility check. Use the Google Home or Nest setup process and Google’s compatibility guidance before purchasing.
- Check power requirements. Determine whether the replacement needs a C wire or an approved Nest Power Connector.
- Use professional installation when appropriate. Complex or unfamiliar wiring is a reason to obtain a qualified HVAC compatibility assessment rather than guess.
- Choose between retaining and recycling the old unit. Keep it only if local control remains useful, and use Google’s recycling-label process if disposal is preferable.
What is the bottom line for owners?
The three affected early Nest Learning Thermostats are not completely dead. They remain usable at the wall, with preset schedules, but they have permanently lost app control and other cloud-connected functions after October 25, 2025. Keep the thermostat if local operation is sufficient; replace it if remote access, notifications, smart-home control, or ongoing updates matter. Verify HVAC compatibility before ordering or installing any replacement.
Frequently Asked Questions
Is every old Nest thermostat no longer supported?
Google ended support for the Nest Learning Thermostat 1st gen, 2nd gen, and 2nd gen Europe version on October 25, 2025. Newer-looking or newer-generation Nest thermostats are not automatically included in this specific notice.
Can I still use my old Nest thermostat without the app?
Yes, an affected thermostat can still be adjusted directly at the wall, and preset schedules continue to work. The thermostat no longer supports app control, remote access, notifications, third-party assistants, or software and security updates.
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No. A Nest Power Connector is intended to provide stable power for supported replacement thermostats when a C wire is absent or unreliable; it cannot restore cloud support or app access to an unsupported 1st- or 2nd-generation Learning Thermostat.
Will a new Nest thermostat work with my HVAC system?
Check the HVAC voltage, terminal wiring, equipment type, stages, transformers, and connected accessories. Nest thermostats are designed for most 24-volt systems, while high-voltage, millivolt, proprietary, dual-fuel, dual-transformer, and complex systems may be incompatible or require professional installation.
The Bottom Line
Bottom line: Google’s shutdown affects only the Nest Learning Thermostat 1st gen, 2nd gen, and 2nd gen Europe version. Those thermostats still provide local control and preset schedules, but they no longer work with the Nest or Google Home apps or receive updates. Replacement is optional, but any new thermostat must be checked against the HVAC system and power wiring first.
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