Google Nest Learning Thermostat (4th gen) + Nest Temperature Sensor (2nd gen) - Obsidian
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Availability:
Only 3 left in stock, order soon!
Arrives
Tuesday, Mar 10
Color: Polished Obsidian
Features
- Nests 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]
- 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], its easy to install yourself and its 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
- Better visibility into adjustments: Asks for permission to make schedule changes to help you save energy; you'll receive notifications in the Google Home app, and you can view and accept changes with a tap[1]
- Manage hot and cold spots: It comes with the Nest Temperature Sensor (2nd gen) and works with any Nest Temperature Sensor; put a sensor in any room and use the Google Home app to set the temp it should reach at a certain time of day
- Savings you can count on: The Nest Learning Thermostat can help save up to 31% on heating and cooling bills[2]
- New natural heating and cooling: Your thermostat learns how the temperature outside affects the temperature inside (for example, when the sun coming through the windows will heat the house naturally) and pauses your system to help you save[1]
- New Adaptive Eco: It uses the temperature outside to help find an energy-saving temperature when youre away and returns to a comfortable temperature within an hour of your return[1]
- Please refer to the Legal section below for all applicable legal disclaimers denoted by the bracketed numbers in the preceding bullet points (e.g., [1], [2], etc.)
Description
The Nest Learning Thermostat (4th gen) is Google’s smartest, most advanced thermostat yet. It’s a beautiful way to save energy. It learns the temperatures you like, when you like them, even as your routine changes.[1] And it helps make sure your heating and cooling systems run smoothly.
Brand: Google
Model Name: Google Nest Learning Thermostat (4th Gen)
Product Dimensions: 0.04"D x 0.15"W x 0.15"H
Special Feature: Auto Away Mode, Auto Scheduling, Temperature Display
Brand: Google
Model Name: Google Nest Learning Thermostat (4th Gen)
Product Dimensions: 0.04"D x 0.15"W x 0.15"H
Special Feature: Auto Away Mode, Auto Scheduling, Temperature Display
Color: Polished Obsidian
Specific Uses For Product: Air Conditioner
Temperature Control Type: Heating,Cooling
Connectivity Technology: Wi-Fi
Included Components: Thermostat Display, Thermostat base, Trim plate, Steal plate, Mounting screws and wiring labels, Nest Temperature Sensor (2nd gen)
Power Source: Battery Powered
Item Weight: 161.8 Grams
Voltage: 24 Volts
Material: Aluminum
Shape: Round
Display Type: Touchscreen
Control Type: Button Control
Control Method: App
Connectivity Protocol: Wi-Fi
Mounting Type: Wall Mount
Style: English
Backlight: Yes
Number of Batteries: 1 CR2 batteries required. (included)
UPC: 193575038476 193575040189
Manufacturer: Google
Smart Home Compatibility: Smart Home Compatible
Part Number: GA05169-US
Item Weight: 5.7 ounces
Item model number: CE911542
Batteries: 1 CR2 batteries required. (included)
Size: One Size
Item Package Quantity: 1
Special Features: Auto Away Mode, Auto Scheduling, Temperature Display
Batteries Included?: Yes
Batteries Required?: Yes
Battery Cell Type: Lithium
Date First Available: August 6, 2024
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Tuesday, Mar 10
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Color: Polished Silver
I was trying to determine if I was having an issue with my thermostat, my furnace.. or both (yikes). I had an Ecobee, which had been installed for roughly 10 years. Worked great, then I started having issues with getting heat to turn on in my house as it should. Process of elimination, I opted to try Google Nest. I LOVE this. Massive upgrade to what I had, easy to install, and the issue I was having became clear to be the thermostat and not my furnace. In fairness, it likely just needed to be upgraded, but I have other Google Home items and have heard good things about Nest. I have been very happy with it already. And unlike the Ecobee where I need to set schedules for 'home' vs 'away', etc.. this is a learning thermostat, so it naturally learns when you aren't home and just turns the heat off (within reason - I haven't woken up to my house being below 50 degrees or anything). If I am gone all day, the moment I walk in the door and the Nest "sees" me.. it kicks on to heat. It's also very sleek looking, but super easy to use so it doesn't come off super techy or anything. Highly recommend!
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Reviewed in the United States on January 23, 2026 by Ginger S
Color: Polished Silver
This thermostat is great. It was easy to install, walked through wiring, and has been worked wonders on my power usage while keeping my temps comfortable. This has always been a struggle because the back of my house is NW facing and almost all windows. In the South. My primary is farthest away from the HVAC, so the sensor helps the system find a balanced temp. My bedroom is usually 8-10° cooler (lots of windows and an exterior door). But I can also deselect the bedroom sensor if it’s not a concern at the time. I loved it enough to buy a second and I can’t wait to compare my 12month usage before and after.
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Reviewed in the United States on February 24, 2026 by Girl w autoimmune probs - Shop with me for recs!
Color: Polished Gold
I purchased a 2nd generation Nest a couple years back and decided to upgrade with this one as I loved the color. First, the appearance is gorgeous with its mirror-like face. Second, the "learning" capabilities are AMAZING! This feature allows it to do exactly as it states; It learns your habits and even works with your electric company to bring the utmost savings to you! We have Alexas integrated throughout our entire home so this works and pairs GREAT with them. Accuracy is always very sharp and carried out effectively as programmed. Energy saving is huge and this helps you do that with no effort at all, it does it for you! If I could change one thing, it would be the app. I really like the interface of the nest app much better and I am not really a Google device person so it's a thorn in my side to have to download apps I don't use for multiple things. Installation is a little tricky but my boyfriend has become a pro at it with all the different houses we have rented and re-installed them into so it can be done!
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Reviewed in the United States on February 27, 2026 by Mandy Margeaux Mandy Margeaux
Color: Polished Obsidian
When one of our 3rd Gen Nest Thermostats stopped working, I decided to replace it with a 4th Generation Nest unit. Oddly, the mounting hardware for the 4th Generation is completely different from the 3rd Generation, which is annoying. The wiring backplate is incompatible, as the 4th Generation has a different electrical connector to the thermostat. One nice thing about the new backplate is that there is a light built into the bubble level which signals voltage on the Rh or Rc wires from the HVAC unit, implying you won't need a dedicated C wire for power. Unfortunately, this is many times not the case for the 4th Generation, lit bubble level or not. When I properly mounted and connected the 4th Generation thermostat, the setup app on my phone reported that there was "no power" on the R wire, even though the bubble level was lit, and I could measure the voltage on a multimeter. There was no way to get around the error message in the app. A call to Google support was completely useless. The support person clearly didn't know why the setup app falsely reported "no power", or whether or not the 4th Generation thermostat required higher voltage on the R wires than the 3rd Generation thermostat for operation without a C wire. An internet search revealed numerous people posting on Reddit and other web sites of the same issue I was having. How could Google support not be aware of this? Depending on your view, the difference between the R wire voltage requirements for the 4th Generation from the 3rd Generation thermostats is either an undocumented design change, or a design flaw. Personally, I consider it a significant design flaw, especially that it is not documented in the setup instructions, and there is no warning of this anywhere in Google's documentation. After spending about two hours removing the 3rd Generation mount, installing the 4th Generation mount, waiting for the callback from Google, and figuring out the root cause myself, I unmounted the 4th Generation Nest, packaged it back up, and returned it. I ordered a new 3rd Generation Nest from Amazon, and it works flawlessly with the HVAC unit. One attraction of the 4th Generation Nest is that the "maintenance band", the temperature variance range at which the AC compressor cycles on and off, is manually programmable, while on the 3rd Generation Nest it is not. There have been complaints that the 3rd Generation Nest's maintenance band is only two degrees F wide, which in some climates and homes cycles the compressor too often, and is blamed for excess wear and premature failure on the compressor. (AC units and heat pumps both use compressors.) So if you have a C wire in your compressor-based system, I recommend trying to use a 4th Generation Nest. Another trick which works with both generations is to use a remote sensor in a different part of the room or another room where the ambient temperature doesn't vary as quickly, to reduce compressor cycling. I use this trick for our 3rd Generation Units, and it also works for 4th Generation thermostats. Note that using a remote sensor this way may require some experimentation to get the desired result, while the feature to manually adjust the maintenance band makes it quicker and simpler. I really like the Google Nest thermostats when they're working the way they're supposed to, but the lack of backward functional capability from the 3rd Generation model to 4th Generation model is inexcusable, since there's no warning about it. And Google support is ineffective in helping less technical buyers. The least Google could do is document the issue properly on their web site.
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Reviewed in the United States on May 24, 2025 by IMR