Amazon Smart Thermostat Review: Alexa-Controlled Heating at the Lowest Price in the Category
Automatic scheduling and energy savings in a compact unit, tied entirely to Alexa, with a C-wire adapter included.
The Amazon Smart Thermostat is the budget entry to smart heating: it holds a schedule, adjusts automatically, and is controlled by Alexa, which is also its only integration. That single fact defines it, since Google Home, Apple HomeKit, SmartThings, Home Assistant, IFTTT and Matter are all unsupported. The hardware is deliberately basic, with a monochrome non-touch LED display, no humidity sensor, no occupancy detection and no support for remote temperature sensors, so every decision is made from the temperature at the wall. This version includes a C-wire adapter, which removes the most common installation obstacle.
- Alexa households
- First smart thermostat on a budget
- Homes without a C-wire
- Single-zone heating
Pros
- Lowest price in the smart thermostat category
- C-wire adapter included, removing the most common install obstacle
- Manual and automatic scheduling with energy saving features
- Alexa control for voice and remote adjustment
- Compact 90 mm square body with a trim plate included
- Simple installation and setup
Cons
- Alexa only: no Google Home, HomeKit, SmartThings, Home Assistant, IFTTT or Matter
- No support for external temperature sensors, so it cannot balance uneven rooms
- No humidity, occupancy or air quality sensing
- No alerts of any kind
- Monochrome, non-touch display that does not show time or weather
- No speaker or on-device voice control
- 2.4 GHz Wi-Fi only, and a one year warranty
Who is the Amazon Smart Thermostat for?
It is for someone in the Alexa ecosystem replacing a dumb thermostat, where the goal is scheduling and remote control rather than sophistication. Automatic scheduling and energy saving behaviour are supported, so the practical benefit, not heating an empty house, is present. Including the C-wire adapter matters more than it sounds: the missing common wire is the single most frequent reason a smart thermostat install stalls, and having the adapter in the box avoids a separate purchase or an electrician.
What it offers
Temperature sensing, manual and automatic scheduling, energy savings features and Alexa control, on a compact 90 mm square body with a trim plate included to cover the marks left by an older, larger thermostat. The LED display shows the current temperature. It connects over 2.4 GHz Wi-Fi, which is the norm for thermostats and helps with range through interior walls.
What to know before you buy
Alexa is the only platform, and that is a hard limit: no Google Home, no HomeKit, no SmartThings, no Home Assistant, no IFTTT and no Matter, so this thermostat cannot participate in any other ecosystem. It does not support external temperature sensors, so it cannot balance a house where one room runs cold, which is the main reason people buy sensor-capable thermostats. There is no humidity sensor, no occupancy or proximity detection, no air quality sensing and no alerts of any kind. The display is monochrome, not a touchscreen, and does not show time or weather. There is no speaker and no on-device voice control, so Alexa commands go through an Echo device.
Is the Amazon Smart Thermostat worth it?
It is the cheapest way to make heating schedulable and remotely controllable, and for an Alexa home with a single well-placed thermostat that is often all that is needed. The savings from not heating an empty house are real regardless of how basic the hardware is. Look at more capable thermostats if you need room sensors for an unevenly heated home, humidity data, or any platform other than Alexa, because none of those can be added later.
Frequently asked questions
Does the Amazon Smart Thermostat work with Google Home or HomeKit?
No. Alexa is the only supported platform, and no other integration is available.
Can I add remote room sensors?
No. External temperature sensors are not supported, so it heats based on the temperature at the thermostat itself.
What if my wiring has no C-wire?
This version includes a C-wire adapter, which is what allows installation in homes that lack the common wire.
Does it show humidity?
No. There is no humidity sensor, and the display shows temperature only, without time or weather.
Can I talk to the thermostat directly?
No. It has no speaker or built-in voice control, so Alexa commands go through an Echo device elsewhere in the home.
