---
product_id: 35829148
title: "Nest T3017US Nest Learning Thermostat - 3rd Generation"
brand: "google"
price: "£173.13"
currency: GBP
in_stock: true
reviews_count: 13
url: https://www.desertcart.co.uk/products/35829148-nest-t3017us-nest-learning-thermostat-3rd-generation
store_origin: GB
region: United Kingdom
---

# Energy-saving Leaf indicator Remote control via app HVAC system alerts & monitoring Nest T3017US Nest Learning Thermostat - 3rd Generation

**Brand:** google
**Price:** £173.13
**Availability:** ✅ In Stock

## Summary

> 🔥 Stay cozy, save green, and control your comfort like a boss! 🌿

## Quick Answers

- **What is this?** Nest T3017US Nest Learning Thermostat - 3rd Generation by google
- **How much does it cost?** £173.13 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/35829148-nest-t3017us-nest-learning-thermostat-3rd-generation)

## Best For

- google enthusiasts

## Why This Product

- Trusted google brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Anywhere Control:** Adjust your home's temperature from your phone, tablet, or laptop anytime, anywhere
- • **HVAC Health Monitoring:** Proactively protects your system with alerts and maintenance reminders
- • **Sleek Farsight Display:** Bright, polished metal design with motion-activated info visible from across the room
- • **Energy History Insights:** Track and optimize your energy use with detailed reports and quick display access
- • **Smart Schedule Learning:** Automatically adapts to your lifestyle for effortless comfort and savings

## Overview

The Nest Learning Thermostat 3rd Gen is a smart, programmable thermostat that learns your schedule to optimize heating and cooling, saving you up to 12-15% on energy bills. Featuring remote control via Wi-Fi, HVAC system monitoring, and a sleek motion-activated display, it integrates seamlessly with Alexa and Google Assistant for voice control. Compatible with 95% of HVAC systems, it’s designed for easy installation and delivers real-time energy insights to keep your home comfortable and efficient.

## Description

The Nest Learning Thermostat is a smart thermostat that learns your schedule and programs itself to help save energy. You can control it from anywhere with the Nest app, and it works with Alexa and Google Assistant so you can adjust the temperature with your voice. And it’s beautifully designed, with a big, bright display and metal finishes to suit any home’s style. [1] Remote control and mobile notifications require working internet and Wi-Fi. [2] Alerts can notify you of a potential issue with eligible HVAC systems. They’re meant to provide helpful information, not an endorsement, representation, or warranty of any kind about the health of your HVAC system. Alerts aren’t intended to replace a diagnosis by a qualified HVAC professional. [3] Energy savings are not guaranteed and depend on energy usage, weather, and other factors. [4] Voice control requires a compatible device, and working internet and Wi-Fi. [5] Independent studies showed that Nest thermostats saved people an average of 10% to 12% on heating and 15% on cooling. Based on typical energy costs, we’ve estimated average savings of $131 to $145 a year. Individual savings are not guaranteed. [6]Nest Renew requires 3rd generation Nest Learning Thermostat, Nest Thermostat E, or the newest Nest Thermostat (sold separately), connected to a Google account. Only available in areas served by major continental US grids. Only available for customers on certain electric utility time-of-use rates. Learn more at support.google.com/googlenest/answer/11156316. [7]Adjustments only shift electricity usage from your heating and cooling.

Review: The Nest is freaking awesome. I love it's ease of use and how ... - The Nest is freaking awesome. I love it's ease of use and how smart it is, it feels much better in my house over my previous thermostat. My old thermostat had scheduling that was set up by the previous home owners and I had no way to figure out how to change it or what to change it to. I pretty much just constantly would walk down stairs (3 story townhouse) and manually mess with the controls when it was too cold or too hot. That's another thing, my old thermostat wouldn't turn on until you went up a couple degrees above the current temp and it wouldn't turn off until it was a couple degrees higher than that. Same goes in the other direction, the thermostat wouldn't turn on unless it was really really cold if at all because of the stupid scheduling. I don't have those problems with Nest. I have it set to 70 and it seems to know what the temperature is better than the old thermostat. It turns on for a bit and turns off at an appropriate time. Nest says it's still 70 and it just feels comfortable. It's still in it's learning phase so I've had to adjust the temperature here or there when it got too cold in the upstairs rooms, but overall it's much, much better. And to adjust things without ever leaving my comfy bed by using my phone is amazing. I haven't had it long enough to see what my electric bill is so we'll see if I adjust my review a couple months from now, but the comfort I feel at home and the convenience seem worth any extra cost or savings. Installation was easy, the hardest part I had was around the C wire or Common wire and also getting the device seated to the base. For me, the C wire was plugged into my old thermostat so I plugged it into the Nest. It refused to even boot up. Did some research and their website said not to use the C wire so I removed it and it booted instantly. Getting the device to click into the base was a bit tricky. It looks like you might have a couple millimeters of space between the two. You don't, it's a tighter fit than it appears. I had to really cram the wires to be as flushed as possible or it flat out wouldn't seat correctly. You'll know if it isn't seated correctly, the Nest tells you and no amount of force pushing on the device will fix that, you need to pull the Nest off the base and re-cram the wires down harder and try again. Another issue I had isn't a Nest problem exactly. My old thermostat was about the same height as the backplate that comes with the Nest, but my old thermostat was longer. Unfortunately the previous owner of my house painted around the thermostat instead of removing it so there is some unpainted wall that is exposed since the plate isn't big enough. Ultimately it would be great if Nest offered some additional back plates you can purchase; I'm currently looking at some options here on desertcart, but it looks like my choices are a big round stainless steel look or something custom built. It's not a huge deal, but just doesn't look good to me. So to summarize: Pro: - Easy installation - Easy set up - Works great, seems smart and gives me better comfort - Love the app (Android) Cons: - Not needing the C wire or Common wire was confusing. I don't think that was in the instruction manual, but I found it on their website. - Wish they had more backplate sizes I could purchase - Wish the device and app worked on local wifi networks. Seems you need internet in order for the App to communicate with the Nest. My internet went down so I had to do things manually going up and down the stairs. Not a big deal, but still annoying when all my other devices work locally. - The way the device connects to the base has me feeling uncomfortable. I had to pull it off the base to re-shove wires a bunch of times and each time it just doesn't feel like it's securely fastened. I worry one of the kids will go to use it and it'll just fall 4.5 feet and slam on the hardwood. That would be a tough $200 pill to swallow.
Review: 5 Star Item - First off, I have to say that I am not only impressed with the actual thermostat but also Nest as a company. This was quite an expensive purchase and took some time making sure I was making the right purchase. One of the things that solidified my decision to purchase this thermostat was Nest's compatibility checker on their website which made the process a lot easier to know it would be compatible with my existing system. It involved me taking off the cover on my existing thermostat, looking at the connected wires and their labels, and then putting that into a checker on their website. Nest told me which models would be compatible and then also how it would look once I received it. Others here say that the installation is simple and they are not lying. I'm somewhat handy, but I hate messing with electronics like this. This was a relatively easy job that took me about 30 minutes, if that. Nest also included most of the tools I'd need to do it, minus one screwdriver but that was to remove my existing unit. Now Nest doesn't leave you in the dark once they get their money like other companies do. While going through the setup in the app (which is extremely user friendly and helpful), I encountered a problem. I called Nest support as I was directed in the app. The wait was about 7 minutes and I was speaking to someone who spoke clear, understandable English and then transferred me to their thermostat division. The call was interrupted for some reason, maybe my end, I don't know, but they called me back and the woman was extremely helpful in explaining. She didn't baby talk me nor did she use jargon most people wouldn't understand. She explained, what turned out to be, a very stupid misunderstanding on my part. Had I read the directions a little more clearly, I would have seen it, I just got confused. Once we got all that cleared up, she sent me an e-mail and directed me to take a picture and send it back to her. The e-mail arrived to me faster than she could finish her sentence, and I'm not exaggerating on that. She received my e-mail as I was done sending it and she explained to me over the phone how my wiring would be done. She also offered to create a customized diagram for me to use which showed me exactly which wires would go where. The rep offered to stay on the phone with me while I finished or encouraged me to call back if I ran into any other issues or questions as they have a 24 hour customer service line just for questions like this. I have to say I was very impressed based on that call alone. Next part was that I had a working thermostat in 5-10 minutes after ending the call with her. It really works! Setting up Alexa was no problem as well which Alexa does on her own for the most part in the app. We needed a thermostat like this for my dad who has been having vision issues. Thanks to this thermostat, he is able to control the temperature in the house much better than before, making him feel more independent and better even though he's in this nasty situation. From myself and my family, we thank you Nest for allowing this for us. The only complaints I have is in regards to the voice control, which I suppose could be changed if we really wanted to. For instance, there's no documentation I could find that tells you exactly what you need to say. But after a Google search, I found a forum on this where someone had the same issue and I found the solution. To control the thermostat using voice, you say "Alexa turn up the heat" or "Alexa turn on the cooling" depending on whether you want air conditioning or heating. I was hoping more for "Alexa turn up the heat to 80" but this is fine. We all now understand what to say and there's no real issue. The thermostat is smart and seems to be learning our habits and how we like the house and the Eco feature is supposed to save us some money on our bill, so we're looking forward to that. I can't comment on either of those features at this time since we've only had the unit for around a month now. As of now, we're extremely satisfied with this. It truly feels like we're living in the 21st century when you can turn up and down the temperature using your voice. And that thermostat is absolutely beautiful to pass by. It has a lot of useful information on the display and also lights up when you pass by. It's really awesome and I'm really excited about it.

## Features

- Programmable smart thermostat that learns your schedule and the temperatures you like and programs itself to help you save energy and stay comfortable
- Home/Away Assist automatically adjusts itself to an Eco Temperature after you leave, so you don’t heat or cool an empty home; remote control lets you change the temperature from anywhere on your phone, laptop, or tablet[1]
- With Energy History, just check your phone to see how much energy you used and why, or use Quick View on the display to reach Energy History, settings, or your schedule; the Nest Leaf appears when you choose a temperature that saves energy
- Smart thermostat with HVAC monitoring, which looks out for your heating and cooling systems; sends an alert if something doesn’t seem right, along with helpful reminders to make maintenance easier[2]
- The Nest Learning Thermostat works with the Nest Temperature Sensor (sold separately) to help make sure a certain room is the exact temperature you want it to be
- Beautifully designed, with polished metal finishes and bright, high resolution display; Farsight shows you the temperature, weather, or time on your thermostat when you walk in the room
- It’s easy to install your thermostat, typically in 30 minutes or less, with everything you need included in the box; compatible with 95% of heating and cooling systems
- Google Nest Learning Thermostat (Stainless Steel) with a Google Authenticity Seal
- Nest Renew makes it simple to support clean energy right from home; it works with your Nest Learning Thermostat[6] to help you automatically prioritize your usage[7] to times when energy is cleaner or less expensive
- Please refer to the product description section below for all applicable legal disclaimers denoted by the bracketed numbers in the preceding bullet points (e.g., [1], [2], etc.)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07KNFSXFV |
| Additional Features | Daylight Savings Time Ready |
| Backlight | Yes |
| Best Sellers Rank | #17,045 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #31 in Home Programmable Thermostats #57 in Home Nonprogrammable Thermostats |
| Brand | Google |
| Brand Name | Google |
| Color | Mirror Black |
| Connectivity Protocol | Wi-Fi |
| Connectivity Technology | Bluetooth, Wi-Fi |
| Control Method | Voice |
| Control Type | Voice Control |
| Controller Type | Amazon Alexa, Google Assistant , nest |
| Customer Reviews | 4.4 out of 5 stars 32,630 Reviews |
| Display Type | LCD |
| Included Components | All |
| Item Dimensions D x W x H | 3.3"D x 3.3"W x 1.21"H |
| Item Type Name | Google |
| Item Weight | 8 ounces |
| Manufacturer | Google |
| Manufacturer Part Number | T3018US |
| Material Type | Metal |
| Model Name | Nest |
| Model Number | T3018US |
| Mounting Type | Wall Mount |
| Number of Batteries | 1 Lithium Ion batteries required. (included) |
| Power Source | Battery Powered |
| Product Dimensions | 3.3"D x 3.3"W x 1.21"H |
| Product Style | Thermostat Only |
| Shape | Round |
| Smart Home Compatibility | Smart Home Compatible |
| Special Feature | Daylight Savings Time Ready |
| Specific Uses For Product | Air Conditioner |
| Specification Met | energy,reach |
| Temperature Control Type | Heating, Cooling |
| UPC | 813917022023 813917021033 |
| Unit Count | 1.0 Count |
| Voltage | 24 Volts |

## Product Details

- **Brand:** Google
- **Controller Type:** Amazon Alexa, Google Assistant, Insteon, Nexia, nest
- **Model Name:** Nest Learning Thermostat
- **Product Dimensions:** 3.3"D x 3.3"W x 1.1"H

## Images

![Nest T3017US Nest Learning Thermostat - 3rd Generation - Image 1](https://m.media-amazon.com/images/I/71kGIM+faQL.jpg)
![Nest T3017US Nest Learning Thermostat - 3rd Generation - Image 2](https://m.media-amazon.com/images/I/81nNcuI+HVL.jpg)
![Nest T3017US Nest Learning Thermostat - 3rd Generation - Image 3](https://m.media-amazon.com/images/I/81V4Reb1-WL.jpg)
![Nest T3017US Nest Learning Thermostat - 3rd Generation - Image 4](https://m.media-amazon.com/images/I/81mL6VAjI3L.jpg)
![Nest T3017US Nest Learning Thermostat - 3rd Generation - Image 5](https://m.media-amazon.com/images/I/81Nm1ol5zUL.jpg)

## Available Options

This product comes in different **Color** options.

## Questions & Answers

**Q: does nest need a c wire**
A: Only if you want it to work for more than a year. The instructions and folks here will tell you the c wire isn't required,  but I have found that that is not really true.  Sure, it will work for 6 to 12 months, but then the battery will die. You can then try charging it with a USB cable but the first time you do that you will get a couple days more use from it. After that, it won't last long enough to work. And, if you try to replace the battery there's a good chance that won't work, either and, if you are lucky enough to still be under warranty,  it voids your warranty.  My 2nd nest has just failed and rather than buy a 3rd, or pay an electrician to add a c wire, I am going to replace it with a much less expensive honeywell.

**Q: does this work with 220v**
A: NO, a not. Google Nest is not designed for 220v electrical-baseboard heating systems, and attempting to connect it to such a system will destroy the unit. 

However, if your baseboard system is boiler/steam-heated, it WILL work with those, since those are still a low-voltage system that simply opens & closes a valve to regulate temperature.

On a side note, it is utterly dreadful just how poor the quality other answers here are. Do people honestly not know what 220v is in relation to heating? Folks, simply enough, if you don't know the answer, then DON'T respond.

**Q: How does it detect when you're home? If we're gone and kids are home with a babysitter, will it know someone's home? Or is it based on cell location?**
A: If you add Nest Protect smoke/CO detectors, the system will also use their motion detectors to sense if you're home.  This can be useful if the thermostat is located somewhere that doesn't get much foot traffic or if you spend long hours in another room.

**Q: Can the Nest replace my current Nexia thermostat ?**
A: You will have to get a wiring diagram to see if nest is compatible.

## Customer Reviews

### ⭐⭐⭐⭐⭐ The Nest is freaking awesome. I love it's ease of use and how ...
*by K***4 on November 30, 2016*

The Nest is freaking awesome. I love it's ease of use and how smart it is, it feels much better in my house over my previous thermostat. My old thermostat had scheduling that was set up by the previous home owners and I had no way to figure out how to change it or what to change it to. I pretty much just constantly would walk down stairs (3 story townhouse) and manually mess with the controls when it was too cold or too hot. That's another thing, my old thermostat wouldn't turn on until you went up a couple degrees above the current temp and it wouldn't turn off until it was a couple degrees higher than that. Same goes in the other direction, the thermostat wouldn't turn on unless it was really really cold if at all because of the stupid scheduling. I don't have those problems with Nest. I have it set to 70 and it seems to know what the temperature is better than the old thermostat. It turns on for a bit and turns off at an appropriate time. Nest says it's still 70 and it just feels comfortable. It's still in it's learning phase so I've had to adjust the temperature here or there when it got too cold in the upstairs rooms, but overall it's much, much better. And to adjust things without ever leaving my comfy bed by using my phone is amazing. I haven't had it long enough to see what my electric bill is so we'll see if I adjust my review a couple months from now, but the comfort I feel at home and the convenience seem worth any extra cost or savings. Installation was easy, the hardest part I had was around the C wire or Common wire and also getting the device seated to the base. For me, the C wire was plugged into my old thermostat so I plugged it into the Nest. It refused to even boot up. Did some research and their website said not to use the C wire so I removed it and it booted instantly. Getting the device to click into the base was a bit tricky. It looks like you might have a couple millimeters of space between the two. You don't, it's a tighter fit than it appears. I had to really cram the wires to be as flushed as possible or it flat out wouldn't seat correctly. You'll know if it isn't seated correctly, the Nest tells you and no amount of force pushing on the device will fix that, you need to pull the Nest off the base and re-cram the wires down harder and try again. Another issue I had isn't a Nest problem exactly. My old thermostat was about the same height as the backplate that comes with the Nest, but my old thermostat was longer. Unfortunately the previous owner of my house painted around the thermostat instead of removing it so there is some unpainted wall that is exposed since the plate isn't big enough. Ultimately it would be great if Nest offered some additional back plates you can purchase; I'm currently looking at some options here on Amazon, but it looks like my choices are a big round stainless steel look or something custom built. It's not a huge deal, but just doesn't look good to me. So to summarize: Pro: - Easy installation - Easy set up - Works great, seems smart and gives me better comfort - Love the app (Android) Cons: - Not needing the C wire or Common wire was confusing. I don't think that was in the instruction manual, but I found it on their website. - Wish they had more backplate sizes I could purchase - Wish the device and app worked on local wifi networks. Seems you need internet in order for the App to communicate with the Nest. My internet went down so I had to do things manually going up and down the stairs. Not a big deal, but still annoying when all my other devices work locally. - The way the device connects to the base has me feeling uncomfortable. I had to pull it off the base to re-shove wires a bunch of times and each time it just doesn't feel like it's securely fastened. I worry one of the kids will go to use it and it'll just fall 4.5 feet and slam on the hardwood. That would be a tough $200 pill to swallow.

### ⭐⭐⭐⭐⭐ 5 Star Item
*by N***N on March 2, 2019*

First off, I have to say that I am not only impressed with the actual thermostat but also Nest as a company. This was quite an expensive purchase and took some time making sure I was making the right purchase. One of the things that solidified my decision to purchase this thermostat was Nest's compatibility checker on their website which made the process a lot easier to know it would be compatible with my existing system. It involved me taking off the cover on my existing thermostat, looking at the connected wires and their labels, and then putting that into a checker on their website. Nest told me which models would be compatible and then also how it would look once I received it. Others here say that the installation is simple and they are not lying. I'm somewhat handy, but I hate messing with electronics like this. This was a relatively easy job that took me about 30 minutes, if that. Nest also included most of the tools I'd need to do it, minus one screwdriver but that was to remove my existing unit. Now Nest doesn't leave you in the dark once they get their money like other companies do. While going through the setup in the app (which is extremely user friendly and helpful), I encountered a problem. I called Nest support as I was directed in the app. The wait was about 7 minutes and I was speaking to someone who spoke clear, understandable English and then transferred me to their thermostat division. The call was interrupted for some reason, maybe my end, I don't know, but they called me back and the woman was extremely helpful in explaining. She didn't baby talk me nor did she use jargon most people wouldn't understand. She explained, what turned out to be, a very stupid misunderstanding on my part. Had I read the directions a little more clearly, I would have seen it, I just got confused. Once we got all that cleared up, she sent me an e-mail and directed me to take a picture and send it back to her. The e-mail arrived to me faster than she could finish her sentence, and I'm not exaggerating on that. She received my e-mail as I was done sending it and she explained to me over the phone how my wiring would be done. She also offered to create a customized diagram for me to use which showed me exactly which wires would go where. The rep offered to stay on the phone with me while I finished or encouraged me to call back if I ran into any other issues or questions as they have a 24 hour customer service line just for questions like this. I have to say I was very impressed based on that call alone. Next part was that I had a working thermostat in 5-10 minutes after ending the call with her. It really works! Setting up Alexa was no problem as well which Alexa does on her own for the most part in the app. We needed a thermostat like this for my dad who has been having vision issues. Thanks to this thermostat, he is able to control the temperature in the house much better than before, making him feel more independent and better even though he's in this nasty situation. From myself and my family, we thank you Nest for allowing this for us. The only complaints I have is in regards to the voice control, which I suppose could be changed if we really wanted to. For instance, there's no documentation I could find that tells you exactly what you need to say. But after a Google search, I found a forum on this where someone had the same issue and I found the solution. To control the thermostat using voice, you say "Alexa turn up the heat" or "Alexa turn on the cooling" depending on whether you want air conditioning or heating. I was hoping more for "Alexa turn up the heat to 80" but this is fine. We all now understand what to say and there's no real issue. The thermostat is smart and seems to be learning our habits and how we like the house and the Eco feature is supposed to save us some money on our bill, so we're looking forward to that. I can't comment on either of those features at this time since we've only had the unit for around a month now. As of now, we're extremely satisfied with this. It truly feels like we're living in the 21st century when you can turn up and down the temperature using your voice. And that thermostat is absolutely beautiful to pass by. It has a lot of useful information on the display and also lights up when you pass by. It's really awesome and I'm really excited about it.

### ⭐⭐⭐⭐⭐ Works great now but...
*by G***. on January 7, 2016*

I bought this item through Amazon, as always the item came well packaged and on time. If there is one thing I have ever learned, that is nothing is as easy as plug and play, but first I want to get to the good. Besides what others have said this does show the current temp in the house but it is on the outer ring and in small numbers. Others have complained that the current temp is to small and the temp setting being the focus is a problem for them, I am more concerned with what temp I set it to, not what the current temp is. Once the unit has programmed it's self based on your temp preferences the only reason to be concerned with the current temp is if the unit fails to turn on, or you really have to have that gee wiz info. I bought this to save money not to impress others with the screen and info. The screen is large, easy to read, I like that it turns on when you walk up to it, it is simple to use, the app is great and works flawlessly, and yes it is a bonus that it looks nice. Now for the bad, when I installed it I followed all the instructions, all the wires went exactly where they belong. It is nice that for those with large dual zone systems and humidifiers and all the bells and whistles they have stickers with the wire names provided, they say Y1, RH W1, G and so on. My system only used 4 wires R, Y, W, G and had no jumpers for the old system so my system was not exactly rocket science to wire correctly. I kept getting a fault saying it would not recognize the Y1 (cooling) wire, after trouble shooting on my own I confirmed the connections were good, no wires broken or twisted and everything was good on that end. In this 4 wire configuration there is no blue (or sometimes black) wire which is required, this is a power wire that some systems use to provide constant 24 volt power to the thermostat. If you do not have this wire some systems will still work with this unit with no problem, it simply takes a little power from the RH and Y1 to get its power, and remember it was not recognizing my Y1. I finally call customer support and was on the phone with them for about 2 hours, they were very polite and tried there hardest to help but that night it was getting to late at night and the house getting to cold to deal with it and the thermostat required a full charge to continue troubleshooting. As a side bar there is a mini USB plug on the back of the faceplate that works with android style plugs to provide a quick charge, this is in the event of extended black outs you can recharge fast. So for the night I reconnected the old thermostat and the HVAC worked fine. Next morning I'm back on the phone with tech support. After giving them the case number from the night before we started going through many of the steps again since my old thermostat seemed to work fine that proved there was no problem with the HVAC wiring it's self, so this wire detection problem was a bit of a mystery. After moving wires to different terminals and reading out voltages from the tech info screen for about a hour and a half, they determined that it was a faulty base plate, they were kind enough to order a replacement base plate and even overnight FEDEX it to me, so at this point I'm waiting for a part that might fix the problem. Knowing modern housing construction practices, I still had my suspicions that it was not a issue with the baseplate but was a wiring problem with the HVAC, besides I hate throwing parts at a problem to see what might fix the issue. I had a friend that does HVAC look at the system, first thing he said was I needed that C (blue) common wire connected to provide enough power. I had already tried that and seen that the issue was not fixed, that was because as I suspected the system was not wired up correctly. The common wire was there but not connected to anything, so after rewiring the entire system we got the Nest thermostat to work as advertised. There are two morals to this story, first is that Nest tech support is great and they try everything they can to get you up and running, but in the end you are talking to IT people not HVAC professionals. The second moral is if your are replacing a old "dumb" thermostat or even a newer programmable one but not a "smart" one, and they worked fine before does not mean that the system was wired up correctly to work with this unit. So if you plug it in and it gives you a E80 fault code and you do not have a blue wire or it's not connected to the terminal, chances are you need it, and after connecting it if you continue to have faults chances are your blue wire is not connected properly. If you really are insitant on upgrading your thermostat call a HVAC person to look at your system.

## Frequently Bought Together

- Google Nest Learning Thermostat - 3rd Gen (2015) - Programmable Smart Thermostat for Home - Works with Alexa - White
- Compatible with Google Nest Thermostat 1st/2nd/3rd Wall Plate Cover - Petrichor Nest Thermostat Trim Kit, Made for Google Nest Thermostat 1st/2nd/3rd, Cover Imperfections Easy to Install - Snow
- Spigen Wall Plate Designed for Google Nest Learning Thermostat 1st/2nd/3rd Generation Wall Plate - Matte White

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*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-06-03*