ecobee3 Lite Smart Thermostat - Programmable Wifi Thermostat - Works with Siri, Alexa, Google Assistant - Energy Star Certified - DIY Install, Black
Condition: Used - Very Good
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Availability:
Only 2 left in stock, order soon!
Arrives
Saturday, Nov 15
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Features
- Save up to 23% annually on heating and cooling costs (compared to a hold of 72F)
- Control from anywhere using your Android or iOS device
- Add SmartSensor to manage hot or cold spots and deliver enhanced comfort to the rooms that matter most
- Automatically pauses your heating or cooling when a door or window is left open (requires ecobee SmartSensor for doors and windows and a Smart Security subscription)
- ecobee was named an ENERGY STAR Partner of the Year award winner
- Integrates seamlessly with your preferred smart home system. Connectivity - Wi-Fi, 802.11 b/g/n @ 2.4 GHz
- Compatible with most 24VAC HVAC systems: furnaces, ACs (2H/2C), heat pumps (2H/2C + 2 stage AUX), boilers, PTACs, and fan coil units (3 fan speeds). Includes Power Extender Kit for C-Wire-less homes, ensuring easy installation. DHCP (dynamic) or static IP addressing 168 bit SSL encryption
Description
Sleek design and elevated comfort meet impactful energy savings. Save up to 23% annually on heating and cooling costs with ecobee3 lite, the smart thermostat that helps you live smarter and save more. Get a new handle on control and convenience. Manage your comfort from anywhere with the ecobee app on your iOS or Android mobile device. Compared to a hold of 72°F. Occupancy detection manages temperature automatically.
Brand: ecobee
Model Name: ecobee3 lite
Product Dimensions: 1"D x 4.05"W x 4.05"H
Special Feature: Door Sensor, Window Sensor
Brand: ecobee
Model Name: ecobee3 lite
Product Dimensions: 1"D x 4.05"W x 4.05"H
Special Feature: Door Sensor, Window Sensor
Color: Black
Specific Uses For Product: Furnace
Temperature Control Type: Heating, Cooling
Connectivity Technology: Wi-Fi
Included Components: ecobee3 lite thermostat, power extender kit, hardware pack, instructions, wire labels, mounting plate, trim plate
Power Source: AC/DC
Item Weight: 1 Pounds
Voltage: 24 Volts
Material: Plastic
Shape: Rectangular
Display Type: Touchscreen
Finish Type: BLACK
Screen Size: 3.5 Inches
Control Type: Touch
Control Method: Voice
Connectivity Protocol: Wi-Fi
Mounting Type: Mounting plate and screws
Style: ecobee3 Lite SmartThermostat
Backlight: Yes
Number of Batteries: 1 Lithium Metal batteries required. (included)
UPC: 627988303154
Global Trade Identification Number: 54
Manufacturer: Ecobee
Part Number: EB-STATE3LT-02
Item Weight: 1 pounds
Item model number: EB-STATE3LT-02
Batteries: 1 Lithium Metal batteries required. (included)
Is Discontinued By Manufacturer: No
Finish: BLACK
Pattern: Thermostat + Smart Thermostat Voice Control
Item Package Quantity: 1
Special Features: Door Sensor, Window Sensor
Batteries Included?: Yes
Batteries Required?: Yes
Battery Cell Type: Lithium Metal
Warranty Description: 3 year limited warranty.
Date First Available: April 18, 2017
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Saturday, Nov 15
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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Similar Products
Top Amazon Reviews
Color: Black
Style: ecobee3 Lite SmartThermostat
Pattern Name: Thermostat + Smart Thermostat Voi...
I have never installed something like a thermostat before. I have let this product sit in my cart for the last couple of months while I debated on if I was qualified enough for the daunting task of install. I wish I would’ve just purchased this a LONG time ago. And here is why…. THE APP NOT ONLY TELLS YOU WHAT TO DO STEP BY STEP BUT IS INTERACTIVE!! I have NEVER had a product with such a user friendly (such an under rated term here) interface that tells you what to do BASED ON YOUR WIRING!! That’s right. You remove your old thermostat and tell the app which wires you see and it tells you what you need to do based on your specific situation. I will say I was very lucky and had the common wire and did NOT have to install the adaptor to my HVAC system. However, honestly the apps Instillation guide is so intuitive I’m sure that the extra step would have been easy enough. I know it may seem like I am rambling a bit. In this part of the review however, I want everyone to understand that the biggest reason for my hesitation was not the price of the unit but the installation process. I did not want to have to pay an additional fee for someone else to install. If I could possibly do it myself once I receive the product I had it installed within 15 minutes. The Ecobee Smart Thermostat is in itself, a wonderful and intuitive product. The product itself looks very elegant and doesn’t look like your typical hospitals style look. This looks futuristic and modern. I absolutely love how intuitive the sensor is like when you walk by the screen changing to show you a little bit more information. The software seems to know how to show you the right information to. When I want to look at the weather, it gives me just a glance at what is going on outside, which is wonderful and then I can expand it more to look into the future if I choose. The ecobee app is very user-friendly and easy to use as well. Setting up my thermostat through the ecobee app was super easy and quick. PRO TIP: Once the thermostat is installed, you can access the Apple QR code to connect your thermostat to your HomeKit ecosystem. The QR code is not the QR codes on the actual product cards inside the box. I really love the fact that this thermostat helps save on your heating bill by maximizing the heating and cooling of your HVAC system. But I was really impressed when during the install process, the software prompted me to enter my ZIP Code to show me who my local energy supplier was and allowed me to Request a rate decrease with the new install of the smart thermostat. I have not purchased any of the sensors yet, so I cannot contest to that ability of the software. However, I will be purchasing them in the future and will update my review accordingly.
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Reviewed in the United States on November 13, 2023 by HanzCooper HanzCooper
Color: Black
Style: ecobee3 Lite SmartThermostat
Pattern Name: Thermostat + Smart Thermostat Voi...
My A/C Technician recommended this thermostat so I purchased it. I called ecobee tech support before I ordered the ecobee thermostat to see if it would be compatible with my HVAC system. He explained that the wiring was the important thing. Their live support hours are M-F 8am to 11pm and Sat-Sun 9 to 9. My installer could call any time during those hours for questions. My A/C installer also said ecobee had great tech support. He installed it with no problems. I received a text from ecobee telling me how to link the thermostat with my smart phone, and gave me a link to install the app. I'm a senior and I managed to do it without needing to call support, just by following the directions on the app and the thermostat. It also guided me to register my thermostat and apply for a $75 rebate. It works great with my android phone. It worked great manually, also, before I set up the app and link.
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Reviewed in the United States on April 5, 2025 by Diane
Color: Black
Style: ecobee3 Lite SmartThermostat
Pattern Name: Thermostat + Smart Thermostat Voi...
I love this thermostat! The Ecobee Lite has been a fantastic upgrade for our home. Installation was straightforward, and the app makes it super easy to control the temperature from anywhere. I love the clean, modern design and how much more efficient our heating and cooling has been since installing it. It’s simple, smart, and has already helped us save on energy costs. Highly recommend if you’re looking for an affordable smart thermostat! It works very well and is easy to control.
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Reviewed in the United States on April 29, 2025 by Katherine White Katherine White
Color: Black
Style: ecobee3 Lite SmartThermostat
Pattern Name: Thermostat + Smart Thermostat Voi...
Love this product! I had a nest prior to this and had a few issues with it. So I decide to go with the ecobee and I’m happy I did so. It’s reliable and easy to use. Also has been very efficient and has helped financially.
Reviewed in the United States on July 17, 2025 by nick
Color: Black
Style: ecobee3 Lite SmartThermostat
Pattern Name: Thermostat + Smart Thermostat Voi...
So first of all I want to tell people about a strange thing that happened with mine. I honestly thought I had a C-wire when I ordered this and then find out the hard way that I, in fact, do not. (Curiously enough the installer even ran five wires through the wall and just left the C-wire disconnected.) So when I found out I just figured I would simply connect the C-wire and no trouble (ok, it was a bit of trouble since I had to figure out exactly where to connect it -- despite all the pictures they may show in their manual not all devices will have a nice simple board with properly labeled terminals and all for you to connect to. Mine just has wires running to a transformer and various relays all unlabeled. Fun. If anyone is looking into this, you want to connect the C-wire to the other side of the same end of the transformer that the R-wire runs from -- you should read about 24V AC between the terminals +/- maybe as much as 4 or 5V while idle, but not much more than that. If you get 40+ or something you're on the wrong terminals and absolutely _must_ not connect it this way.) But for some reason this didn't work. At first... I thought I must have been doing something wrong, so I got an external power kit wanting to do this thing right and proper (and this way if I ever change thermostats again to anything newer in the future I'll be able to power the new one too.) It still didn't work. It wouldn't even turn on either via the C-wire or external power, so you can imagine my surprise and how unhappy I was. I was beginning to think I must have a defective unit. I even disconnected it and ran a couple of alligator clips to the external power supply (and nothing else) just to see if it would turn on and it still wouldn't. In sheer desperation I install the "Power Extender Kit" (PEK) mostly just so I could be sure I wasn't just somehow doing something horrendously wrong. Now suddenly it turns on. But with caveats (more on that in a moment.) Since the PEK wasn't working out I decide I'm going to call them and find out what's going on, but of course since I'm a night person and this has already taken many hours their phone lines are all closed down. Meanwhile, I take the PEK out and connect the wires normally again. In sheer frustration I put the thing back in one more time just because. This time it turns on FROM the C-wire. So apparently it had to be powered once via the PEK to function. This is obviously not as intended and not normal, but now it has worked 100% perfectly since then running entirely from the C-wire with zero troubles. Anyway, the moral of this little story is: if yours won't turn on, maybe try the PEK for just a few minutes and then try the C-wire again. No, this doesn't make any sense at all. But apparently it works... ------------------------------------------------------------------------------ Anyway, on to the actual review. Firstly, for the most part it works very well. Like some others I really wonder why it can't let you just connect directly to the thermostat while you're in the same house though. It's great that it uses the cloud for maximum connectivity, but there's no reason it couldn't run a local server (it's not like it needs anything really complex just to run on the LAN.) When your connection goes down you can only control it -- as others have said -- by actually walking up to the thermostat. And this isn't just a question of laziness. It takes a lot more fiddling with the small low resolution touchscreen than the much easier to operate interface with a mouse or even phone/tablet touchscreen to do things like adjusting comfort settings or even just manually turning on the fan or something. Though if you just need to do a quick temperature override it does this quickly and easily enough on the touchscreen. (You can even set it to ask every time which sort of override you want, so this is a nice plus at least.) It's very worthwhile here to take note of the fact that cloud-only functionality means that if they ever take down their servers or if the servers are ever seriously hacked or anything then you won't be able to control it away from the actual thermostat anymore... They likely won't support the same old hardware forever, so someday these may ultimately just quit working outside of controlling directly at the thermostat essentially (thus they go from being a "smart" thermostat to being a classic dumb one just with a touchscreen.) Some people can afford to update expensive things like this every time a new revision comes out. Some of us have to keep using the same thing as long as there is no new functionality added by something new that we actually require (and what else is a new one going to do?) There is no technical reason the device can't do this -- in fact, if nothing else they could give us software that connects to the same interface it uses going to the Internet instead of it doing two services -- it just does not. Also, it looks like if you want more complex programming it CAN do it now. It looks like you can simply add more comfort settings and put them in the schedule at different times to suit your needs. It's probably a bit more complex to set up scheduling than it is on simpler thermostats, but overall it isn't too bad. I saw reviews saying it only had two programming settings which (if you exclude away) is technically true only in that by default this is all that is on there. More accurately it only understands three main situations: home and away (sleep apparently is just plain separate.) But you can add multiple comfort settings in each of these two categories. I'll admit I haven't played around with this though. I prefer to keep it relatively simple. Especially with the addition of actual sensors to detect when I'm away since that's the main time I would want it to stop cooling or heating as much. Perhaps other reviews are right in that it doesn't actually allow the temperature to go far from the normal setting in away mode though. I haven't tested that. Still, it's going to save a little bit of power versus no away mode as with a standard thermostat at the very least. It does have a vacation mode which I presume sets things much more loosely. I haven't tested this at all. One big plus though is the support for external sensors. Very few "smart thermostats" support external sensors. In fact, at the time this was the only actual smart thermostat I could find that didn't have horrendous software. Seems even the Nest doesn't? Maybe I'm missing something, but regardless, this one definitely does support sensors. Unfortunately, the sensors come only in a two pack and this two pack is ridiculously expensive for how little they ultimately actually do. (A person with the appropriate know-how could get an Arduino or RPi and temperature sensors and connect them up -- assuming they don't use some sort of encryption or something -- for maybe between half to a third of the cost because the actual hardware involved is very uncomplicated. Unfortunately this is beyond most of us and they are taking advantage of that. Actually, someone with the know-how to do these could rig up an external sensor controlling even a Nest or whatever, but again, beyond my abilities sadly.) I feel like every part of this is more expensive than its competitors, but I did need the sensors and couldn't build my own. One problem would definitely be the power extender kit (the "PEK.") Many buying this already know if they have a C-wire or not I suppose, so probably not many are counting on having to use this, but I should warn those that do: it basically downgrades this thing to barely being able to do anything. For starters, when I set it up there was absolutely no point in the configuration in which I could specify that a wire was connected to PEK. It always showed that slot as being disconnected in all the menus and nothing would allow me to set otherwise. Worse still though, it basically removed almost all functionality. Since it used the green wire as some sort of virtualized common wire (or at least seems to? I didn't actually test the system using the PEK) it can't even so much as control the fan. There was no cooling option at all, so it was stuck only in heat mode (not a good thing in the summer!) I guess because the W-wire is still connected to the W-wire connection even with the PEK but the Y-wire is not. I had assumed the PEK had done something such as just running the green wire together with the others (eg force the fan to be immediately on and off with cooling and heat) but it seems not. Or if it does there's no way to configure the device to recognize this. Given that I wasn't sure it was even setting itself up right though I didn't really test out the PEK by actually turning anything on, so it may be that this isn't even right (for example, maybe it really was supposed to be as I guessed and the software simply wasn't setting itself up right.) Regardless, I think it may be a really bad idea to buy this intending to use the PEK. I think you should expect to either install a proper C-wire (it's not that hard -- it's just a common ground that doesn't connect through any relays as the other wires would do and I don't know why people don't tell you this) or run an external power kit (they sell plugs that provide 24V AC -- you just connect the external hot to Rc with your system's own R going to Rh -- and the neutral to C. Well, this may not work with two transformer systems. _Perhaps_ you could use its neutral alone without the hot wire. I'm not sure how well that would work out, but presumably the potential is about the same.) I guess the only value the actual PEK may have is powering on the system that first time if it acts up like mine did -- which is obviously not its intended purpose, but whatever I guess. Otherwise you're going to be stuck with only heat functionality. (I guess you could try to trick the system by connecting the cooling to W instead -- assuming it actually works and doesn't blow something up -- but if you did this it would get very confused and you'd basically have to just manually run the cooler since it would otherwise keep trying to cool more and more trying to get the temperature up while it only goes down in heat mode. At that point I'm not sure a smart thermostat would be a good idea anymore.) As long as you can stand the extra expense, you get the advantage of fairly decent software and the surprisingly rare advantage of sensors that just work right out of the box with no significant setup or any soldering involved. Just make sure you do either have a C-wire or external power kit -- do not count on using the PEK if you want to use this thing normally (perhaps the PEK is supposed to be able to, but all I know is the software won't actually allow it to do so and it has been long enough that they would have updated it by now if this were just a minor bug -- and I know mine updated itself at some point in the process of setting it up.) Unfortunately it will probably never be possible to control it via software via the LAN without connecting through the Internet which is kind of silly, but this seems to be the norm among smart thermostats. (I just don't agree that it should be, so this is a negative on them all IMO. The cloud should be secondary -- a convenience only -- not only.)
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Reviewed in the United States on April 2, 2018 by Joshua