Smart Thermostat with C-Wire Adapter
Product ID: 618411161
⚡Energy Star certified savings
📶2.4 GHz WiFi connectivity
🌡️Precise temp control
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The Amazon Smart Thermostat with C-Wire Adapter is a sleek, ENERGY STAR certified device designed for easy retrofit on most 24V HVAC systems. It offers precise temperature control, seamless Alexa voice and app integration, and smart learning features like Thermostat Hunches to optimize energy use and comfort. With guided installation and compatibility with Echo temperature sensors, it’s the savvy millennial’s choice for a connected, energy-efficient home.
| Size | 3.56 x 3.56 x 0.84 in (90.4 x 90.4 x 21.4 mm) |
| Weight | 3.86 oz (109.5 g) Actual size and weight may vary by manufacturing process. |
| Model number | S6ED3R |
| Compatibility | Compatible with most 24V HVAC systems (i.e. conventional force air, heat pump, radiant boiler). Not compatible with 110-240V HVAC systems (like electric baseboard heat). Requires a C-wire power or power adapter kit (sold separately). Most homes have a C-wire. Click check compatibility to see if your home is compatible or requires a power adapter. |
| Certifications | ENERGY STAR – For EPA's ENERGY STAR requirements, see energystar.gov. ECOLOGO Silver – Select replacement parts are available for 3 years after the end of production of your Amazon Smart Thermostat. Learn more here. |
| In the box | Amazon Smart Thermostat, installation tool, wall plate, cosmetic plate, and quick start guide. |
| Network connectivity | 2.4 GHz only, 802.11 b/g/n. Does not support 5GHz networks or connecting to ad-hoc (or peer-to-peer) wifi networks. |
| Audio | No far-field microphone; Alexa-enabled device required for voice control. |
| On-device control | 3 touch buttons on device (Temperature Up, Temperature Down, Select/Mode). |
| On-the-go-control | Alexa app, voice control, on-device, and Echo device compatible. |
| Installation method | Guided installation in the Alexa app. (You may need a power drill, 3/16” drill bit, and a level.) |
| Setup technology | Amazon wifi simple setup enables customers to connect smart devices to their wifi network in a few easy steps. Wifi simple setup is another way Alexa is always getting smarter. Learn more here. |
| App-based features | Option to control with both the Ring app and Alexa app. Features include indoor humidity sensing, schedules (up to seven time periods can be configured, each day of the week), emergency heat mode, vacation mode, energy saving incentives, energy dashboard monitoring, and automatic air filter ordering in the Alexa app. |
| Thermostat Hunches | Enable Thermostat Hunches in the Alexa app. If Alexa has a hunch nobody is home or everyone is asleep, she can adjust the thermostat automatically. Learn more about Hunches. |
| How do Hunches work? | When your phone leaves your home area and nobody interacts with Alexa for a while, Alexa might have a hunch nobody’s home. If no one interacts with Alexa for a while at night, she might have a hunch everyone is asleep. When someone interacts with Alexa or uses smart devices, she can tell that someone is home. Alexa learns from your daily interactions and improves over time. You can also help Alexa know when you go to bed or leave home by saying, “Alexa, goodnight.” or “Alexa, I’m leaving.” |
| Support | Click here to get help using and troubleshooting common issues with Amazon Smart Thermostat. To see questions and answers from other Amazon customers, click here to visit the Amazon Digital and Device Forum. |
| Warranty and service | 1-year limited warranty and service included. Use of Amazon Smart Thermostat is subject to these terms. |
| Generation | Amazon Smart Thermostat - 1st Generation - 2021 release |
| Standby Power | 0.89 Watts |
A**D
Surprisingly Great Alternative to Nest!
I’ve been a loyal Nest Thermostat user for years, but I decided to give the Amazon Smart Thermostat a try, and I’m genuinely impressed! It’s super easy to set up with the Alexa app, and the integration with my Echo devices is seamless. The minimalist design looks clean on my wall, and it’s been reliable at keeping my home comfortable. I love how it learns my preferences through Alexa Hunches—no manual tweaking needed. While I typically buy Nest for its premium feel and Google Home compatibility, this thermostat holds its own, especially for the price. If you’re in the Alexa ecosystem, I highly recommend giving this a shot!
D**R
Pretty nifty product - looks good, works good - recommended.
Living with it installed now for around 3 months I am very pleased with it. While thousands of miles away from home, I had to turn on the heat and set the thermostat to a higher temperature - and it worked perfectly.
M**G
Love this thermometer, a little advanced installation
I love the usability features of this thermometer, including integration with my Echo. The backplate completely covered the space left by my former thermostat and I think it actually looks better with the backplate anyway. This might be important if you don't have the matching paint for the wall. My installation required a c-wire which I think added significantly to the complexity of the installation. My brother-in-law installed it for me, but he is an advanced handyman. However, it is important to note that the online instructions go into whether the c-line is needed, so you can figure this out in advance. However, it was totally worth it !
H**E
DO NOT PURCHASE
I bought this thermostat as it had great reviews and because I trust amazon products. I waited to install until after my home remodel and fell outside of the return window. Why is that important to note? I had an electrician install the smart thermostat, honeywell C-adapter, and the compatible cover plate only to have the item be useless due to the Amazon Alexa App and am out $120.00 with no option to return or get a refund. I spent hours troubleshooting with the support team and calling the manufacturer for guidance and what it came down to was the Alexa App was not allowing for connection... keep in mind I reset the thermostat twice to factory settings, installed-uninstalled- and-reinstalled the Alexa App on THREE separate devices, and rebooted my internet countless times all to be told its an issue with the App. There is no way to use the thermostat manually without connecting to the app and amazon won't stand by the product or the darn app. DO NOT BUY.
E**S
Wonderful
Wonderful
G**Y
Money savor
Purchased the Amazon smart thermostat hoping to save a little on electricity, and it hasn't disappointed. Also received a $50 rebate from my electric company. I replaced a fairly new programmable thermostat that just seemed to make ac run constantly. This smart thermostat was easy to connect with easy to follow directions. Very pleased.
A**T
Good
Works. Used to replace my old thermostat. Had to do tons of research to wire everything correctly because my house was wired funny.
A**R
You don’t need the Honeywell thing
Don’t get this bundle just get the thermostat.
Trustpilot
2 days ago
3 weeks ago