How to install Amazon smart thermostat

The Amazon Smart Thermostat is the first officially Amazon-branded thermostat. You can install Amazon Smart Thermostat on your own by following the step-by-step instructions below. If you need any help, you can contact Amazon’s 24/7 customer service via phone, chat, or email. If you prefer, you can also hire Amazon Home Services or a local HVAC tech to do the installation instead.

How to install Amazon Smart Thermostat

Time needed: 1 hour

Installation takes about 1 hour for most customers. The following tools will help with the installation:
– A drill with a 3/16-inch drill bit
– A pen or pencil
– A level

  1. Turn off the power to your thermostat

Go to your electrical fuse box and switch your HVAC fuse to “off”.

amazon smart thermostat step 1

2. Remove your old thermostat’s faceplate

remove old thermostat step 2

3. Check your old thermostat for high voltage wiring

The Amazon Smart Thermostat is only compatible with 24V (low-voltage) systems and not with high voltage systems (110V/220V). If you haven’t yet checked for compatibility, you can do so here: Amazon Smart Thermostat Compatibility.

amazon smart thermostat high voltage compatibility step 3

4. Take a photo of your old thermostat’s wiring

It’s important to have a photo of your old wiring, just in case you need to return the wiring to the way it was before.

5. Check if you have a C (Common) wire

If you have a wire labeled “C”, proceed to step 8. If not, proceed to step 6.

6. Check for an extra unused wire at the thermostat installation location (conditional)

If there’s an unused wire behind the wall, you may be able to use it as your “C” (Common) wire. If you have an extra wire, proceed to step 7. If not, you’ll need to install the optional C wire power adapter.

thermostat extra wire step 6

7. Check for an extra unused wire at your furnace control board (conditional)

Open your furnace panel and check for the same extra wire found at the thermostat installation location. If it’s connected to the “C” or “Common” terminal, close your furnace, and proceed to step 8. If it’s not connected, then proceed with connecting the wire to the “C” or Common terminal, then close your furnace, and proceed to step 8.

furnace c wire step 7

furnace c wire connect step 7

8. Remove one wire at a time and label each with the stickers included in the Amazon Smart Thermostat packaging

You may need to unscrew or unclip each wire. Make sure you also label the “C” (Common) wire, if you have one.

amazon smart thermostat step 9

9. Remove your old thermostat’s wall plate

remove old faceplate step 9

10. Place the Amazon Smart Thermostat wall plate on the wall

– Pull the thermostat wires through the middle of the plate.
– Use the level to make sure it’s straight.

level faceplate step 10

11. Use a pen or pencil to mark the location of the holes in the wall plate.

mark drill holes step 11

12. With a 3/16″ bit, drill into the wall on the spots you marked.

amazon smart thermostat step 12

13. Press the plasterboard anchors into the holes.

amazon smart thermostat step 13

14. Install trim plate (optional)

If you need to cover a larger area to cover the holes from your old thermostat or different color paint, you can use the new trim plate that came with your Amazon Smart Thermostat.

amazon smart thermostat step 14

amazon smart thermostat step 14.2

15. Attach the Amazon Smart Thermostat wall plate on the wall

Secure the wall plate with the screws included in the package

attach wall plate step 15

16. Connect your thermostat wires

Connect each labeled wire from your wall to the matching slot in your wall plate. Make sure your wires are connected by gently tugging each one after you connect it.

attach thermostat wires step 16

17. Close the wire cover on your wall plate

close wire cover step 17

18. Attach the Amazon Smart Thermostat faceplate to the wall plate

Align the faceplate with the wall plate and press gently until you hear it click into place.

attach amazon smart thermostat step 18

19. Turn the power back on at the fuse box

amazon smart thermostat step 1

20. Check the thermostat’s display

If the thermostat display reads “SEt” or shows the temperature, then proceed to step 22. If not, proceed to step 21.

amazon smart thermostat step 20

21. Remove the Amazon Smart Thermostat faceplate from the wall (conditional)

If nothing is displayed on the thermostat screen after attaching it to the wall, then some wiring may have come loose during the installation. Take the following steps:
– Make sure all the wires are connected to the wall plate correctly.
– Make sure the power to your thermostat is on.

Once you’ve taken the above steps, attach the Amazon Smart Thermostat faceplate to the wall plate again. If the thermostat still does not display anything, reach out to Amazon customer service for additional support.

22. Connect your Amazon Smart Thermostat to Alexa

In the Alexa app, select “More” at the bottom right, then select “Add a Device” at the top left.

add device step 22

23. Scroll down the list and select “thermostat”

select thermostat step 23

24. Select “Amazon” as the thermostat brand

amazon thermostat step 24

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