Like-New Amazon Smart Thermostat Save money and energy - Works with Alexa and Ring - C-wire required
TMT 252
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23%
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Save energy - According to EPA estimates, ENERGY STAR certified thermostats save an average of $50 on yearly energy bills.
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What Stands Out
Product Details
- Save energy - According to EPA estimates, ENERGY STAR certified thermostats save an average of $50 on yearly energy bills.
- Automatic Control - Alexa can automatically switch between your preferred home, away, and sleep temperatures.
- On-the-go control - Let Alexa set the temperature, or set it yourself from anywhere with the Alexa app.
- You can do it - The Alexa app will guide you through the installation process, but customer service is always available.
- Reliable - Made with Honeywell Home Thermostat Technology and backed by 130 years of experience.
Product Technical Details
| 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 Gold – 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) Wi-Fi 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 Wi-Fi simple setup enables customers to connect smart devices to their Wi-Fi network in a few easy steps. Wi-Fi 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. Additional features like indoor humidity sensor reporting, energy dashboard monitoring, and scheduling (up to four time periods can be configured, each day of the week) in the Alexa app. |
| Automatic Control | Option to enable Thermostat hunches in the Alexa app for automatic control. If Alexa has a hunch nobody is home or everyone is asleep, she can adjust the thermostat automatically. Learn more about hunches. |
| 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 Security Cameras is subject to the terms found here. License information can be found here. This device receives the same limited warranty as a new device. Learn more about Like-New Amazon devices. |
| Generation | Amazon Smart Thermostat - 1st Generation - 2021 release |
| Standby Power | 0.89 Watts |
Who Should Buy?
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Tech-Savvy Homeowners
Perfect for individuals comfortable with technology and DIY projects, allowing easy installation and smart features.
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Energy-Conscious Users
Ideal for those looking to reduce energy costs; ENERGY STAR certification aids in saving on utility bills.
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Alexa Users
Great for individuals who already use Alexa, as this thermostat integrates seamlessly with smart home devices.
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Non-Technical Users
May not be suitable for individuals uncomfortable with technology or DIY installations, requiring professional installation assistance.
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Low Budget Customers
Not ideal for users seeking budget-friendly thermostat options, as it may require higher upfront costs for installation.
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C-Wire Limitations
Unsuitable for homes lacking a C-wire, since this model requires it for proper functioning and connectivity.
Product Description
Customer Questions & Answers
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Question:
What is the C-wire requirement and why is it important?
Answer: The C-wire, or common wire, is essential for providing continuous power to the smart thermostat. Unlike traditional thermostats that run on batteries, the C-wire ensures that the thermostat has enough power to operate Wi-Fi, smart features, and display options reliably. If your home doesn't have a C-wire, it might be necessary to run one from your HVAC system. This requirement is crucial for ensuring optimal functionality and minimizing disruptions in your home's climate control.
Amazon S6ED3R Editorial Review
The Certified Refurbished Amazon Smart Thermostat is a convenient and energy-saving addition to any home. With its DIY installation and compatibility with Alexa, it offers a user-friendly and accessible experience. The thermostat can be easily controlled and programmed through the app, allowing for temperature adjustments from anywhere. It is also compatible with various heating systems, including gas floor heaters and multiple HVAC units. Customer reviews have been mostly positive, with users praising the convenience and energy-saving capabilities of the product. The ability to control the thermostat through Alexa has been particularly appreciated. However, some users have experienced issues with the thermostat cycling on and off too frequently, which raises concerns about potential damage to the furnace. Additionally, some users have found the app confusing to use and have requested additional features such as a vacation mode. Overall, the Certified Refurbished Amazon Smart Thermostat is a good product for those looking to upgrade their home thermostat with smart capabilities. However, potential buyers should be aware of the possibility of cycling issues and the limited functionality of the app.
Customer Reviews & Ratings
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5 Star
61%
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4 Star
12%
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3 Star
6%
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2 Star
4%
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1 Star
17%
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Pros
- DIY installation
- Works with Alexa for convenient control
- Energy-saving capabilities
- Compatible with various heating systems
- Can control multiple thermostats through one account
Cons
- Confusing app interface
Product Price History
Important information
- Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
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TMT 252
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Ubuy works hard to protect your security and privacy. Our advanced payment security system ensures confidentiality by encrypting your information during transmission using AES (Advanced Encryption Standards) and SSL (Secure Socket Layer) protocols. Your payment details are 100% secure as we do not share your payment details with third party sellers.
Features & Benefits
- Certified Refurbished Smart Thermostat
- ENERGY STAR certified
- DIY install
- Works with Alexa
- Save an average of $50 on yearly energy bills
- Backed by 130 years of experience

















