Google Nest Learning Thermostat (4th Gen, 2024) with Nest Temperature Sensor – Energy Saving Smart Thermostat – Works with Alexa, Apple HomeKit and Google Home App – Polished Obsidian

No C-wire needed, works well, & looks nice
Three reasons I like this product:1) C-Wire: I don’t have a c-wire available. There are VERY few modern smart thermostats that claim to work without one.I first tried one of the others, the Sensi. It did not have any apparent easy way to determine in advance if it would work without a c-wire. It didn’t work for me. The lack of an easy advance tool cost both of us time and money; a lose/lose. A wrote a well-deserved 1 star review of that product.This product does have a very easy tool to determine in advance if it will work without a c-wire. It took me literally 10 seconds to use that tool & be confident this would work. And, it does, in fact, work great without a c-wire.2) Functionality:It comes with a remote temp sensor which is a new thing for me and a great idea. I put mine in the bedroom. It was crazy-easy to set up and I really like the simple interface letting you choose when & how you want the thermostat to use it. It says you can add more of these if you want.Programming a daily schedule is incredibly easy as is making quick adjustments to that schedule.It has all sorts of other features such as auto-adjusting based on who is home, learning your patterns & making further auto adjustments, accepting voice commands, and so on. I do not want to use any of those things. They made it very easy for me to just say “no thanks” to all of those things and still have a nice seamless experience.3) Appearance: I hesitated to buy this product because it is round while my previous thermostat was rectangular and the wall is messed up everywhere behind the area of the old thermostat. Yes, I can patch a wall and paint it – but, no, I don’t really want to if I can avoid it. It was a pleasant surprise to me that this thermostat came with an optional large faceplate that is made to cover up the bad wall in exactly my situation. I used it and it is great.Privacy is a concern but that seems to come with just about everything these days so – I don’t know – just get over it?I recommend this.

May not work in HVAC systems without a C wire, when the 3rd Gen Nest Thermostat will
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.

Been a great upgrade to our home. Super easy to use, reasonably priced and looks great. We have tried most of them on the market and like this one the best.

I bought a Google Nest Thermostat from Amazon, and initially, I wasn’t sure how to install it. I contacted the supplier, Mr. Mumtaz, who was incredibly helpful. He came over and installed it for me and did such a great job that I ended up getting one more thermostat, which he also installed. The devices are now working perfectly, and I’m very satisfied with the performance. Highly recommend both the product and the excellent service!

I recently upgraded to the Google Nest Learning Thermostat (4th Gen) with the Nest Temperature Sensor (2nd Gen), and I couldn’t be happier with the purchase. This device not only modernized my home but also noticeably reduced my energy consumption.What I Loved:Adaptive Learning – The thermostat quickly learned my schedule and started adjusting the temperature automatically to fit my lifestyle. I barely have to touch it now!Sleek Design – The circular display looks clean and futuristic. It fits perfectly with my home décor.Remote Sensors – The Nest Temperature Sensor is a game-changer. I placed it in my child’s room, and the thermostat now prioritizes that area, ensuring a comfortable temperature where it matters most.Energy Savings – Within the first month, I noticed a drop in my energy bill. The Eco Mode kicks in when we’re away, and it does a great job of managing heating/cooling efficiently.App Control – Adjusting the temperature from my phone (or even voice control with Google Assistant) is incredibly convenient. I can tweak settings from anywhere, which is especially handy when traveling.Room for Improvement:Price – It’s on the higher end, but considering the energy savings and convenience, I see it as an investment that pays for itself.Installation – While not overly complex, some people might prefer professional installation if they aren’t familiar with HVAC systems.Final Thoughts:If you’re looking to upgrade to a smart thermostat that blends tech, energy efficiency, and comfort, this is it. The combination of learning technology and temperature sensors ensures your home stays cozy in the right places at the right times. Highly recommended!