Nest T4000ES E Hubless Smart Thermostat

First, I am an almost 84 year old woman with minor "handyman" skills. I looked over the instructions several times, and also found a video on You Tube and viewed that. I was able to install this unit, after removing our Honeywell unit, with very little trouble. Originally, our "R" wire did not show up, so I had to take off the cover, pull out that wire, make sure it was straight and inserted firmly, and that brought success. Admittedly, it was made easier because all our wires were color coded to match the letter they had, and we had every wire we needed. The one thing I wished was that I had brought some really good "VHB" double faced tape home, and put the backer plate on with that. Our drywall is so old that the screws just rattled around. I was able to fix it with tape for the time being, but I think at some point I'll need to remove it and reinstall the backplate more firmly with better tape. So -- have no fear! I did turn off my main electrical switch just in case but other than that, just about anyone should be able to install this unit. After we got air conditioning, our Honeywell thermostat started to malfunction, and the furnace would turn on and would not turn off. Our gas bill went through the roof -- about $180 when it is normally, in winter, about $60.00. I wish I would have ordered this a month ago, but I didn't realize what the bill would be like! Obviously, the savings would have paid for the new thermostat. All that said, we all love this thermostat! It looks nice, and when you get close, you know what the temperature is. You can easily set it, and everything responds almost immediately. Our furnace has barely gone on at all, and yet it is comfortable (we are having a reasonably warm spell -- not uncommon here in Southern Cal.)

The thermostat was very easy to install and set up. It went to a different language at first and I had to change it back to my language. Besides that it works great with the app and with Alexa. I would recommend it highly.

Great thermostat. Why the one-star review? The one from Amazon was crap. It was old (but unused) and defective. The first clue was when I installed it and nothing happened. I kept pressing on the front and turning the dial and nothing - zip - nada. I diligently read the manual and there was no step I missed. So I googled it and found that some people said you had to charge it -- no mention of that in manual. So I took it off the wall and charged it. Then the real fun began. I could not get it to connect to my wifi. The QR code would not work and the hand-entering of serial numbers etc also did not work. Thus began my 2-3 hours of time on the phone with Google support. They finally confirmed the unit was defective and I sent it back to Google and am getting a replacement. The hint was that Google said the warranty expired Nov 2025 when I bought the unit in Jan 2026 from Amazon! It was sold by Woot and shipped by Amazon. Clearly this unit had been acquired long ago and probably not stored correctly. So, while I highly recommend the thermostat (I love the retro feel of it, and its subtlety), I caution anyone buying any tech things sold by a third party like WOOT.

I waited awhile before I reviewed the E so I could get to know it a bit and I'll still need more time because this thermostat is not a one trick pony. It also is not a techno geek toy. The average person with a standard heat/cool system can have this thermostat functional in less than an hour. If you can accomplish that then you're set to have the E pay for itself within the first year. If you have to hire someone it'll take longer but at least you'll have the satisfaction of knowing you will have reduced your carbon footprint from the moment you turned it on. I've had set back thermostats for years which were a nightmare to program that I always eventually just abandoned and used manually. This one is self programming so whatever savings are to be had are gotten almost immediately and it'll thrive on weird schedules that no set back t-stat could begin to manage. The only downside is that Alexa and E don't play well but I put that on Alexa. I can ask Alexa what the temperature is in the hallway (the location of the E) and she'll tell me exactly but I have not found the right combination of words that will result in making a change. The more words Alexa has to hear the more likely you are to say them in a way she won't understand and won't act on. That problem will correct itself in the future with or without Amazon's help and if I'm too lazy to get off my butt I can still do it by phone at 40 feet or four thousand miles. It's very functional and just a little bit geeky. I expect the E to be far more popular than it's big brother. I consider this a blue collar thermostat. Hard working and not pretentious. 9-22-17 update I've gotten two responses to my 'command' complaint. There are examples of phrases that do work but I found on my own a simpler way. When I told Alexa to "Set hallway to 72 degrees" she complied and responded "AC set to 72" so I used that as a command and it worked so now I just say "Set AC to **". Obviously that won't work if you have multiple thermostats but I don't expect the E to be put in homes big enough to require more than one heat/cool unit. The support literature is extensive so it takes a lot of interaction to expose it all. I only found the command examples because I was told they were there so I refused to quit until I found them. Edit 2021: I added a star. Absolutely flawless after 3 years.

Does what it’s supposed to

Great product thus far. Only thing I had issue with is installed in winter took a bit to do right and luck it was mild outside. Problem I had was rechargeable back up battery took time to charge so had to pop off and use the alternate micro mini port to charge externally. Once I did that worked like a charm. So, I suggest you pre-charge the unit prior to installing. Also, the Google thermostat-e only displays the temp. No option to display date/time. As the gen3 does. Also agree the smoke glass is nice look but could be clearer. Would recommend. Easy to install

Super bueno, sencillisimo de instalar, gran precio....

Had a few weeks now and really effective, looks great and love the feature that you can adjust the temperature using your phone.

Works well