Amazon Smart Thermostat
Compatibility
| Ecosystem | Support | The catch |
|---|---|---|
| Amazon Alexa | Works | Full support |
| Google Home | No | Not supported |
| Apple Home | No | Not supported |
| SmartThings | No | Not supported |
| Home Assistant | Partial | — |
Protocols: WIFI
Subscription reality
✓ Works without a subscription: Yes.
Maintenance reality
- Cloud dependence: Yes — a server shutdown would degrade or brick this device
- C-wire required (adapter kit sold separately); single-stage systems only
The catch
Alexa-only and single-stage HVAC only — check your system before buying.
Who it's for
Alexa households with simple HVAC wanting the cheapest reliable smart thermostat (Honeywell-built).
Sources & method
2026-07 web research sweep (docs/02 catalog; primary sources cited there) — registry-and-press research, verified 2026-07-12 · amazon.com/dp/B08J4C8871 (model S6ED3R) + Amazon 'Getting to Know' guide PDF + ENERGY STAR 2515784 — WiFi-only (no Matter), Alexa-only voice, C-wire required, single-stage conventional HVAC; ~$79.99 — vendor-page research, verified 2026-07-15. 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 →
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.