Product Library / Thermostats

Research profile · last verified 2026-09-30

Amazon Smart Thermostat

Compatibility at a glance

Does it work with your platform?

Choose your platform to see its setup and functions. Your choice carries across product pages.

[2]
[2]
[3][19][21][25][26][27]
[2]
[4][17][22][24]

A connection can work while individual controls or automations remain unconfirmed. Read the connection details ↓

Protocols: WIFI[1][16][20]

Before you buy

What do you need to make it work?

No hub for the device alone

Choose a platform above for its connection. A hub can be optional for the device itself and required for a platform or automation.

One device can provide more than one role. These are setup requirements, not a shopping list of separate purchases.

What could you do with this?

Put its functions to use.

Research, not hands-on testing

Start with a documented control or event. The selected connection shows what is confirmed for that platform.

Documented device function

Target temperature

The device supports this control.

Compare its platform availability in the table below.

Setup and sources

Device documentation: [6] [16] [20] [21]

Documented device function

HVAC mode

The device supports this control.

Compare its platform availability in the table below.

Setup and sources

Device documentation: [6] [16] [20] [21]

Documented device function

Humidity reading

The device reports this event.

Compare its platform availability in the table below.

Setup and sources

Device documentation: [6] [16] [20] [21]

A documented control or event is one part of a setup. It does not by itself establish a complete automation.

The functions, side by side

What can you use, and where?[6][16][20][21]

A platform connection does not confirm every function. Controls and reported events are shown separately from what an automation can use.

Controls
2 documented
Reported events
1 documented

Compare all five platforms. On a narrow screen, scroll the table sideways.

Documented device functions, platform controls and automation availability
Device functionApple HomeDoesn't work[2]Google HomeDoesn't work[2]AlexaWorks; HVAC mode unconfirmed[3][19][21][25][26][27]SmartThingsDoesn't work[2]Home AssistantInconclusive[4][17][22][24]
Target temperatureDevice control
Control

Doesn't work

Control

Doesn't work

Control

Not stated

Control

Doesn't work

Control

Inconclusive

HVAC modeDevice control
Control

Doesn't work

Control

Doesn't work

Control

Not stated

Control

Doesn't work

Control

Inconclusive

Humidity readingReported event
Event

Doesn't work

Event

Doesn't work

Event

Not stated

Event

Doesn't work

Event

Inconclusive

Automation availability for this model is not established.

✓ Documented for this connection. × A stated limit. ◐ A partial function. ? Not established. A listed device function does not establish a complete routine, its other equipment or any plan requirements.

Setup and sources

Apple Home

Managed only via the Alexa app or the Ring app, with no HomeKit certification and no Matter support — the manufacturer's own current spec sheet names no path to Apple Home.[2]

Google Home

Amazon sells it as 'Works with Alexa and Ring', with setup and control through the Alexa app and the Ring app over 2.4 GHz Wi-Fi. The manufacturer's own current spec sheet documents no Google Home, Matter or Thread support of any kind.[2]

Alexa

Setup happens in the Alexa app, and that step is mandatory even if you plan to use the Ring app afterwards. Setting the temperature works through Alexa. HVAC mode is unconfirmed on Alexa: Amazon's help names switching between heat, cool and auto only in the Ring app, and does not say whether Alexa can do it. Voice control also needs an Alexa-enabled device; the thermostat has no microphone of its own.[3][19][21][25][26][27]

SmartThings

Alexa-app and Ring-app control only, with no Matter or Thread radio a SmartThings hub could use, and no appearance in Works with SmartThings partner materials — SmartThings has no documented way to onboard it.[2]

Home Assistant

Not established. Home Assistant has no integration for this thermostat: its Alexa Devices integration covers Echo speakers, Fire TV and Fire tablets, and Amazon's air quality monitor, not the thermostat. Amazon does not name Home Assistant either. Community projects reach it through Alexa or a Homebridge bridge, but neither Amazon nor Home Assistant stands behind them, and owners report they cannot reliably read back what the thermostat is doing.[4][17][22][24]

Device documentation: [6] [16] [20] [21]

Listed device functions are established from vendor documentation. An ability missing here is unestablished, not necessarily absent.

Connection details and setup sources
EcosystemSupportThe catch
Amazon AlexaWorks; HVAC mode unconfirmedWorks; HVAC mode unconfirmed — see the catch[3][19][21][25][26][27]Setup happens in the Alexa app, and that step is mandatory even if you plan to use the Ring app afterwards. Setting the temperature works through Alexa. HVAC mode is unconfirmed on Alexa: Amazon's help names switching between heat, cool and auto only in the Ring app, and does not say whether Alexa can do it. Voice control also needs an Alexa-enabled device; the thermostat has no microphone of its own.
Google HomeDoesn't workVerified: does not work with this ecosystem[2]Amazon sells it as 'Works with Alexa and Ring', with setup and control through the Alexa app and the Ring app over 2.4 GHz Wi-Fi. The manufacturer's own current spec sheet documents no Google Home, Matter or Thread support of any kind.
Apple HomeDoesn't workVerified: does not work with this ecosystem[2]Managed only via the Alexa app or the Ring app, with no HomeKit certification and no Matter support — the manufacturer's own current spec sheet names no path to Apple Home.
SmartThingsDoesn't workVerified: does not work with this ecosystem[2]Alexa-app and Ring-app control only, with no Matter or Thread radio a SmartThings hub could use, and no appearance in Works with SmartThings partner materials — SmartThings has no documented way to onboard it.
Home AssistantInconclusiveWe researched this and the evidence doesn't settle it — the catch explains why[4][17][22][24]Not established. Home Assistant has no integration for this thermostat: its Alexa Devices integration covers Echo speakers, Fire TV and Fire tablets, and Amazon's air quality monitor, not the thermostat. Amazon does not name Home Assistant either. Community projects reach it through Alexa or a Homebridge bridge, but neither Amazon nor Home Assistant stands behind them, and owners report they cannot reliably read back what the thermostat is doing.

? Inconclusive means we researched that ecosystem and the evidence doesn’t settle it — the catch says why, and the sources are listed below. It is a statement about the available evidence, never a verdict on the product. A Setup Check researches your exact setup where the official sources don’t answer.

Plans and ongoing costs[1][16][20]

✓ Works without a subscription: Yes.

Vendor account required: Not established — we have not sourced this yet.

No plan is required or offered for the thermostat itself — control runs through the Alexa app, and optionally the Ring app. Neither Ring's product page nor its setup article names any subscription for this device.

Maintenance and offline use[1]

The catch

Alexa-first by design: setup runs through the Alexa app, and there is no HomeKit, Google Home, SmartThings or Matter path — the Ring app is the only alternative, and it is another Amazon app. On the wiring side it is less restrictive than it looks: most 24V systems work, heat pumps and radiant boilers included, but not 110–240V electric baseboard heat, and Amazon's setup materials describe single-stage systems.

Who it's for

Alexa households with a straightforward 24V system who want the cheapest thermostat that behaves reliably. Wrong fit for anyone on Apple Home, Google Home or SmartThings, and worth confirming your wiring first if your system is multi-stage or dual-fuel.

Sources & method

Numbered sources below back the facts marked with the matching number above. This is a research profile: compiled from manufacturer documentation, certification registries, and published testing — we state facts, not verdicts, and we have not physically tested this unit. How we work →

29 numbered sources· read them in the source's own words
  1. [1] ring.com/products/amazon-smart-thermostat (Ring is an Amazon company) — '$79.99', in stock; model 'S6ED3R'; 'May require a C-wire power or power adapter kit (sold separately). Most homes have a C-wire.'; '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).'; '2.4 GHz only, 802.11 b/g/n. Does not support 5GHz networks'; 'Box Includes Amazon Smart Thermostat, installation tool, wall plate, cosmetic plate, and quick start guide'; '1-year limited warranty and service included'; control listed as 'Ring app, Alexa App, voice control'. No mention anywhere of HomeKit, Google Home, SmartThings, Matter or Thread — Read on the maker's own site, verified 2026-08-08
    Backs: Product identity, Price, Protocols, Works without the internet, Subscription, Market availability, Service status, Research status
  2. [2] ring.com/products/amazon-smart-thermostat (Ring is an Amazon company), read 2026-08-08. The sheet enumerates control as 'Ring app, Alexa App, voice control' and connectivity as '2.4 GHz only, 802.11 b/g/n. Does not support 5GHz networks'. No mention anywhere of HomeKit, Google Home, SmartThings, Matter or Thread. This is the manufacturer's own page and, unlike the amazon.com retail listing it replaced, it is server-rendered and re-fetchable. — Read on the maker's own site, verified 2026-08-08
    Backs: Google Home compatibility, Apple Home compatibility, SmartThings compatibility
  3. [3] Ring's own setup article lists the prerequisites as having the Amazon account linked to the Ring account and 'Set up the thermostat in the Alexa app'; after that the Ring app can 'control heating, cooling, set up automatic controls and adjust temperatures up and down' — Read on the maker's own site, verified 2026-08-08
    Backs: Amazon Alexa compatibility
  4. [4] Home Assistant's own documentation (its Alexa Devices integration does not list the Amazon Smart Thermostat among supported devices — no official integration exists) plus a Home Assistant community thread, 'Pass Amazon Smart Thermostat info to HA' (community.home-assistant.io/t/720795, activity Apr–Nov 2024): control through the community-built Alexa Media Player add-on is one-way, with no way to read the thermostat's state back; the Homebridge Alexa-Smarthome bridge misreports what the thermostat is doing ('always shows idle'). This is a community route, so community evidence is the honest ceiling — partial, community-confirmed — Read on the maker's own site, verified 2026-07-21
    Backs: Home Assistant compatibility
  5. [5] Ring's product page for the Amazon Smart Thermostat, re-read 2026-08-18 — C-wire, HVAC compatibility, 2.4 GHz-only networking, box contents and warranty; no sentence about holding a schedule, adjusting at the device, or controlling the system during an internet outage. — Read on the maker's own site, verified 2026-08-18
  6. [6] ring.com/products/amazon-smart-thermostat, read 2026-08-20: "Easily make temperature adjustments on the go" through the Ring app, and the stated voice command "Alexa, set the temperature to 72 degrees"; "indoor humidity sensor reporting" available through the Alexa App; and "Thermostat Hunches" — "If Alexa has a hunch nobody is home or everyone is asleep, she can adjust the thermostat automatically". — Read on the maker's own site, verified 2026-08-20
    Backs: Capabilities
  7. [7] ring.com's Amazon Smart Thermostat product page, read 2026-08-20. Control methods published as "Ring app, Alexa App, voice control, on-device, and Echo device compatible". The page's only requirement sentence naming an Alexa device is scoped: "Alexa-enabled device required for voice control." Setup notes: "May require a C-wire power or power adapter kit (sold separately). Most homes have a C-wire." In-box list: "Amazon Smart Thermostat, installation tool, wall plate, cosmetic plate, and quick start guide." — Read on the maker's own site, verified 2026-08-20
    Backs: Required hub or bridge
  8. [8] No source was read for this entry, deliberately. It records a classification so the classification is not silent: what was classified is evidence this record already carried — the integration catches and the citations already listed on this page — and none of it was altered., verified 2026-08-22
  9. [9] This record's own flat 'no' answers for each ecosystem and the entries backing them, re-read against the 2026-09-09 rulings on what a claim may rest on., verified 2026-09-09
  10. [10] Record-keeping entry: the identifier entry on this record, which read nothing itself, was linked to the entry that did the reading on 2026-09-12, verified 2026-09-12
  11. [11] the record's own customer-facing prose fields as they stood before 2026-09-13 (no new external read), verified 2026-09-13
  12. [12] https://ring.com/products/amazon-smart-thermostat (Ring is an Amazon company; the page this record already anchors on), read 2026-09-12 and it opened. Power and Connectivity, verbatim: 'Internet Requirements 2.4 GHz only, 802.11 b/g/n. Does not support 5GHz networks'. Installation, verbatim: 'Compatible with most 24V HVAC systems (i.e. conventional force air, heat pump, radiant boiler). Not compatible with 110-240V HVAC systems' and 'Setup Requirement May require a C-wire power or power adapter kit (sold separately). Most homes have a C-wire.' ⚖ WHY THE BAND IS RECORDED HERE WHERE A ROUTER INSTRUCTION WOULD NOT BE: the row names the radio standard ('802.11 b/g/n') and states the exclusion in Ring's own words ('Does not support 5GHz'), which is the shape batch 1 accepted on Nanoleaf, not the bare 'requires a 2.4 GHz network' shape this series refuses. The power source is recorded as low-voltage wiring, following the ecobee and Honeywell records: a 24V thermostat drawing power over the HVAC C-wire, or over the adapter kit that stands in for one. IDENTITY: the same page's General block reads 'Model Number S6ED3R', the model number this record carries. — Read on the maker's own site, verified 2026-09-12
    Backs: Wi-Fi bands it can use, Power source
  13. [13] The product page above says the thermostat is adjusted 'from anywhere, all in the Ring app', and names the Alexa App for guided installation, but carries no App Store link, no Google Play link and no platform row. The setup article https://ring.com/support/articles/dqnm3/How-to-Set-Up-Your-Amazon-Smart-Home-Thermostat-in-the-Ring-App (read 2026-09-12, and it opened) walks through the Ring app and names neither store. The app platforms stay unknown: we looked, and Ring does not publish them. — Read on the maker's own site, verified 2026-09-12
  14. [14] Record-keeping entry: this record's existing 'no' answer for Apple Home now names the platform rule that reason rests on, 2026-09-15, verified 2026-09-15
  15. [15] this record's own lifecycle note as it stood before 2026-09-16 (no new external read): its wording was rewritten so it reads in plain language. No fact, date, source or value changed, and the earlier wording is kept on this record., verified 2026-09-16
  16. [16] Ring's own product page for the Amazon Smart Thermostat, re-read in full 2026-09-22. '$79.99' with no crossed-out figure and a working Add to Cart. 'Model Number S6ED3R'. 'Generation Amazon Smart Thermostat - 1st Generation - 2021 release'. 'Internet Requirements 2.4 GHz only, 802.11 b/g/n. Does not support 5GHz networks'. 'Installation Method Guided installation in the Alexa App.' 'You can install Amazon Smart Thermostat on your own by following the step-by-step instructions in the Alexa App.' 'You may need a power drill, 3/16" drill bit, and a level.' 'If you prefer, you can also hire Amazon Home Services or a local HVAC tech to do the installation instead.' 'Compatible with most 24V HVAC systems... Not compatible with 110-240V HVAC systems'. 'May require a C-wire power or power adapter kit (sold separately).' 'Warranty 1-year limited warranty and service included.' 'Supported Devices Works with Ring and Alexa.' 'On-the-go-control Ring app, Alexa App, voice control, on-device, and Echo device compatible.' — Read on the maker's own site, verified 2026-09-22
    Backs: Product identity, Price, Protocols, Batteries, Subscription, Market availability, Service status, Installation, Wi-Fi bands it can use, Power source, Capabilities, Research status
  17. [17] Home Assistant's Alexa Devices integration page, read in full 2026-09-26. Supported device families: "Amazon Echo Auto Amazon Echo Dot Amazon Echo Flex Amazon Echo Plus Amazon Echo Show Amazon Fire TV Stick Amazon Fire Tablet Amazon Air Quality Monitor Third-party devices with built-in Alexa capabilities." No thermostat is named, and the supported entities are sensors, buttons, media player, notify, select, switch and to-do lists, none of them a climate entity. "Its IoT class is Cloud Polling." — Read what the other company publishes, verified 2026-09-26
    Backs: Home Assistant compatibility
  18. [18] Home Assistant Community, 'Pass Amazon Smart Thermostat info to HA', read in full 2026-09-26. April 2024: control works "via the Alexa media integration" but the poster has "not been able to figure out a way to pass thermostat information back to HA"; a reply describes Homebridge with the Alexa Smarthome plugin into Home Assistant's HomeKit Device integration; November 2024: "It always shows iddle in lovelace.", verified 2026-09-26Someone's observation, checked 2026-09-26This fact comes from an owner, a forum or a community project rather than from the manufacturer. Last checked 2026-09-26.
  19. [19] Ring support, 'Setting up your Amazon Smart Home Thermostat in the Ring app', read in full 2026-09-26. "Your Amazon Smart Thermostat can be set up in the Ring app where you can control heating, cooling, set up automatic controls and adjust temperatures up and down. You’ll need to have your: Amazon account linked to your Ring Account Set up the thermostat in the Alexa app". A second section covers 'Moving your Amazon Smart Thermostat from the Alexa app to the Ring app'. The article names no subscription and neither app store. "Last updated 1 month ago". — Read on the maker's own site, verified 2026-09-26
    Backs: Amazon Alexa compatibility, Service status, Research status
  20. [20] Ring's own product page for the Amazon Smart Thermostat, read in full 2026-09-30. "$79.99" with no crossed-out figure and "Add to Cart". "Model Number S6ED3R Generation Amazon Smart Thermostat - 1st Generation - 2021 release". "Internet Requirements 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." "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)." "Setup Requirement May require a C-wire power or power adapter kit (sold separately). Most homes have a C-wire. You may need a power drill, 3/16” drill bit, and a level." "You can install Amazon Smart Thermostat on your own by following the step-by-step instructions in the Alexa App." "Box Includes Amazon Smart Thermostat, installation tool, wall plate, cosmetic plate, and quick start guide. Warranty 1-year limited warranty and service included." "Supported Devices Works with Ring and Alexa." "On-the-go-control Ring app, Alexa App, voice control, on-device, and Echo device compatible." "Additional features like indoor humidity sensor reporting, energy dashboard monitoring, and scheduling (up to 4 time periods can be configured, each day of the week) in the Alexa App." "Alexa-enabled device required for voice control." — Read on the maker's own site, verified 2026-09-30
    Backs: Product identity, Price, Protocols, Wi-Fi bands it can use, Power source, Installation, Batteries, Subscription, Required hub or bridge, Market availability, Capabilities, Research status
  21. [21] Ring support, 'Setting up your Amazon Smart Home Thermostat in the Ring app', read in full 2026-09-30. "Your Amazon Smart Thermostat can be set up in the Ring app where you can control heating, cooling, set up automatic controls and adjust temperatures up and down. You’ll need to have your: Amazon account linked to your Ring Account Set up the thermostat in the Alexa app". Once connected: "Tap Device Settings: Mode enables you to turn heat, cold or auto on Off turns the thermostat off Up and down arrows will adjust the heat or cold temperature up or down." "Last updated 1 month ago". — Read on the maker's own site, verified 2026-09-30
    Backs: Amazon Alexa compatibility, Service status, Capabilities
  22. [22] Home Assistant's Alexa Devices integration page (documentation 2026.9.4), read in full 2026-09-30. Supported device families: "Amazon Echo Auto Amazon Echo Dot Amazon Echo Flex Amazon Echo Plus Amazon Echo Show Amazon Fire TV Stick Amazon Fire Tablet Amazon Air Quality Monitor Third-party devices with built-in Alexa capabilities." Supported functionality: button, media player, notify, select, switch and to-do entities besides sensors; no climate entity and no thermostat anywhere on the page. "Its IoT class is Cloud Polling." — Read what the other company publishes, verified 2026-09-30
    Backs: Home Assistant compatibility
  23. [23] Home Assistant Community, 'Pass Amazon Smart Thermostat info to HA', read in full 2026-09-30. April 2024: control works "via the Alexa media integration" but the poster has "not been able to figure out a way to pass thermostat information back to HA"; a reply describes Homebridge with the Alexa Smarthome plugin into Home Assistant's HomeKit Device integration; November 2024: "It always shows iddle in lovelace.", verified 2026-09-30Someone's observation, checked 2026-09-30This fact comes from an owner, a forum or a community project rather than from the manufacturer. Last checked 2026-09-30.
  24. [24] Home Assistant's Alexa Devices integration page, read in full on 2026-10-03. Supported device families: "Amazon Echo Auto Amazon Echo Dot Amazon Echo Flex Amazon Echo Plus Amazon Echo Show Amazon Fire TV Stick Amazon Fire Tablet Amazon Air Quality Monitor Third-party devices with built-in Alexa capabilities." No thermostat and no climate entity anywhere on the page. "Its IoT class is Cloud Polling." — Re-checked this against its sources, verified 2026-10-03
    Backs: Home Assistant compatibility
  25. [25] Ring support, 'Setting up your Amazon Smart Home Thermostat in the Ring app', read in full on 2026-10-04. Verbatim: "You’ll need to have your: Amazon account linked to your Ring Account Set up the thermostat in the Alexa app" · "Mode enables you to turn heat, cold or auto on Off turns the thermostat off Up and down arrows will adjust the heat or cold temperature up or down." (the Ring app's Device Settings). — Re-checked this against its sources, verified 2026-10-04
    Backs: Amazon Alexa compatibility
  26. [26] Ring support, 'Setting up your Amazon Smart Home Thermostat in the Ring app', read in full on 2026-10-10 (2,055 characters; the fingerprint matches change detection's). Verbatim: "Set up the thermostat in the Alexa app" · "Mode enables you to turn heat, cold or auto on Off turns the thermostat off" (the Ring app's Device Settings). It states no mode control through Alexa., verified 2026-10-10
    Backs: Amazon Alexa compatibility
  27. [27] Ring's product page for the Amazon Smart Thermostat, read in full on 2026-10-10 (11,368 characters). Verbatim: "Enjoy hands-free temperature control with Alexa. Make your home warmer or cooler, save temperatures as part of your Routines, and more. Just say, “Alexa, set the temperature to 72 degrees.”" · "On-the-go-control Ring app, Alexa App, voice control, on-device, and Echo device compatible." It names temperature control through Alexa and no HVAC mode control., verified 2026-10-10
    Backs: Amazon Alexa compatibility
  28. [28] Amazon's news article '6 ways Amazon devices can help you be more sustainable this Earth Month', read in full on 2026-10-10 (7,770 characters). It names Cleaner Energy and Vacation Mode settings for a thermostat in the Alexa app, and Routines and Hunches; it does not say Alexa switches the Amazon Smart Thermostat between heat, cool and auto., verified 2026-10-10
  29. [29] Amazon's news roundup of its September 2021 devices and services event, read in full on 2026-10-10 (32,308 characters). It mentions the Amazon Smart Thermostat only for utility rebates and says nothing about Alexa changing its HVAC mode., verified 2026-10-10

Compatibility and lifecycle information reflects the last-verified date above and can change without notice (firmware updates, cloud-service changes, discontinuations). It is provided as-is, for information — verify with the manufacturer before purchasing. Spot an error? Tell us and we'll fix it. Full terms: Terms of Service.

Check Amazon Smart Thermostat with your setup.

Your platform, exact hub and the functions you need determine the answer. A Setup Check researches how they fit together.

Get a Setup Check → Use the free compatibility checker