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HolidayBuyer's Guide

Turn off power

Remove the old faceplate

Take a picture

Compatibility check

Label each wire

Detach the wires

Remove the baseplate

Grab a pencil

Attach the Sensi baseplate

Reattach the wires

Snap on the faceplate

Get the app

Create an account

Enter your details

Terms of service

Get online

Sensi's Wi-Fi module

Search for Sensi

Enter your Wi-Fi info

Wait for it to connect

Register your thermostat

Now you're connected

Shut off power to your thermostat at the circuit breaker.

Caption by / Photo by Tyler Lizenby/CNET

Remove your old thermostat's faceplate and set it aside.

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Take a picture of your existing thermostat wiring for reference.

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Visit Sensi's site to see if your existing thermostat wiring is compatible.

You can use the picture you just took to confirm what wires you have.

Caption by / Photo by Tyler Lizenby/CNET

If your thermostat wires aren't already labeled, use the included stickers to tag each one.

Caption by / Photo by Tyler Lizenby/CNET

Disconnect your thermostat wires from your old thermostat.

If your baseplate looks like mine, you'll need a Phillips-head screwdriver to loosen the wires before removing them.

Caption by / Photo by Tyler Lizenby/CNET

Unscrew your old thermostat base plate from the wall.

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If your thermostat wires run the risk of falling behind your wall, use a pen or pencil as a placeholder if you need to step away.

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Feed the wires through the Sensi thermostat's baseplate and use the included hardware to attach it to the wall.

Note: You may need to drill new holes in the wall to match the Sensi baseplate. I got lucky with the alignment of the original holes and was able to skip that step.

Caption by / Photo by Tyler Lizenby/CNET

Use your newly labeled thermostat wires as a guide and connect them to the appropriate port.

Tighten the screws to secure the wires in place.

Caption by / Photo by Tyler Lizenby/CNET

Line up the faceplate with the baseplate and snap it on.

Turn power back on at your circuit breaker.

Caption by / Photo by Tyler Lizenby/CNET

Download the Sensi app for Android or iOS.

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Select "Create Account."

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Add your personal details to make your Sensi account.

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Agree to the Terms of Service.

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Select "Connect thermostat to Wi-Fi."

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Press "Menu" and then "Connect" on your thermostat in quick succession.

Hit the arrow in the app to advance to the next step.

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Go to your phone's settings and select the Sensi Wi-Fi network.

If it prompts you for a password, enter the Sensi security code shown on the card that came with your purchase.

Note: You can also find the security code on the back of your thermostat.

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Return to the app and wait for it to advance to the next screen.

There you'll select your Wi-Fi network from a list and enter your password to connect.

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Give the app a few seconds to connect.

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Here's where you name your thermostat and enter your address and time zone.

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This message will appear when you've successfully installed and connected your Sensi thermostat to the app.

Now you can start controlling your thermostat from your phone.

Caption by / Photo by CNET
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