Emerson 1F76U-22WFB SENSI LITE SMART THERMOSTAT
DOWNLOADING THE APP AND CREATING AN ACCOUNT
YOU WILL NEED
Gather this information before you begin the installation for a smoother walk-through.
- Wi-Fi Network Name/SSID (Make sure this is a 2.4GHz network)
- Wi-Fi Network Password
- Screwdriver
- Hardware in Sensi Lite smart thermostat packaging
DOWNLOAD THE SENSI APP
The Sensi Lite smart thermostat is a Wi-Fi-enabled device. To install and configure your thermostat correctly, you must use the Sensi app. To start the installation process, download the Sensi app to your smartphone or tablet. It is a free download.
CREATE AN ACCOUNT
When you download the Sensi app, you will be prompted to create an account. This is required to access your thermostat remotely and use all the features Sensi offers. Use a valid email address and a password of your choosing to create an account. Remember this email address and password. Your Sensi thermostat will be linked to this email address once it is registered.
INSTALLING THE SENSI THERMOSTAT
STEP 1
Add your thermostat to the Sensi app
INSTALLATION
Once you have downloaded the Sensi app and have created an account, you are ready to install the thermostat to your wall and connect it to Wi-Fi. If there are no registered thermostats, tap the plus (+) sign to add a thermostat.
First, choose which thermostat you purchased. The Sensi Lite smart thermostat option is for the following model numbers:
- ST25 series
- 1F76U-22WFB series
Note: You can check your model number on the back of the thermostat cover.
STEP 2
Is your Sensi thermostat already on your wall?
- NEW INSTALLATION
After choosing your Sensi model, tap New Installation. Next, select whether your thermostat Is Currently Mounted or Not Mounted on the wall. - NOT MOUNTED
This option walks you through a full step-by-step installation process.
You will identify which wires are on your original thermostat, how to label them for Sensi, how to connect your wires and how to connect to Wi-Fi.
If you do not have this thermostat professionally installed, choose this option. It will ensure that your thermostat is properly wired and configured to work with your HVAC system - IS CURRENTLY MOUNTED
This option asks you to identify the wires already installed on your Sensi Lite to ensure that your HVAC settings are correct and connect you to Wi-Fi.
If you had a professional technician install your thermostat, choose this option and skip to STEP 5.
Pro Tip:
If you are DIYing your installation, always choose Not Mounted to make sure your thermostat is wired and configured correctly.
STEP 3
Remove the old thermostat from your wall
- GATHER TOOLS AND PACKAGE CONTENTS
Gather all the necessary tools for installation. - TURN OFF POWER
Turn off the power to your heating and air conditioning system before handling your thermostat wires. - REMOVE OLD THERMOSTAT COVER
Remove the cover using a screwdriver or by pushing the pressure latch. Some covers pull off while others need to be released using a screwdriver. - PHOTOGRAPH YOUR WIRING
THIS IS IMPORTANT. The Sensi app will prompt you to take a picture of your existing thermostat and old wiring in case you need it later.
This can be helpful for troubleshooting with our technical support team, if necessary. The picture you take will be saved to your camera roll or photo gallery. - THROW AWAY ANY JUMPER WIRES
Sensi has a jumper wire built into it, and you will not need any jumper wires from your old unit. - CHOOSE WIRE TERMINALS
Choose the terminal labels that have wires attached to them on your old thermostat. The app will tell you if you have a valid configuration.
If you are getting an invalid configuration message you can learn more about compatibility at sensi.emerson.com/system
- FURNACE TYPE
- Select what type of system you have.
- LABEL YOUR WIRES
Before you disconnect your wires, label your wires using the label stickers provided one wire at a time. - DISCONNECT WIRES AND REMOVE BASE
After all of your wires are labelled, remove the old thermostat base from the wall.
STEP 4
Secure your new thermostat base to the wall and connect wires
- INSTALL SENSI BASE
Use the mounting screws provided and secure the Sensi base to the wall. - CONNECT THE WIRES
Once the Sensi base is mounted and secured on the wall, insert the wires into the corresponding terminals, then tighten the screw.
STEP 5
Scan QR code and attach the thermostat cover
- SCAN QR CODE
On the back of the thermostat or in the Welcome/Get Started insert found in the box, you will find the QR Code to connect the thermostat to your Wi-Fi network. Scan this code. You will need to allow Sensi access to Bluetooth to connect properly.
If you’re having trouble scanning, tap Use PIN to manually enter the code located under the QR code. - INSTALL BATTERIES AND ATTACH THE THERMOSTAT COVER
Install the two provided AAA batteries and push the thermostat cover onto the base - TURN ON POWER
Turn the power to your heating and air conditioning system back on.
STEP 6
Connecting to Wi-Fi and registering your thermostat
Pro Tip:
If the thermostat screen is not turning on after wiring installation, the batteries may not be installed properly. See the troubleshooting section on pg. 7 for more information.
- WI-FI SETUP
On the thermostat, press and hold the Mode Button for four seconds. You will see the setup and Wi-Fi icons appear. - SELECT YOUR WI-FI NETWORK
In the mobile app, select your home Wi-Fi network and then enter your home Wi-Fi network password.
Pro Tip:
Sensi is only compatible with 2.4GHz networks. If your network does not show up in the list, it is either hidden or not compatible with Sensi.
- NAME THERMOSTAT
You can select a name or choose a custom name for your thermostat. Press Next to continue. - REGISTER THERMOSTAT
After successfully connecting Sensi, the app will prompt you to register the thermostat. You can either choose the Locate Me option or fill in your street address, city, state, ZIP code, country and time zone manually. Press Next to continue. - CONTRACTOR INFORMATION (OPTIONAL)
If a contractor professionally installed your thermostat and is registered as a Sensi partner, they have the option to input their phone number here. If there is not a registered number available, simply hit Next to continue. - START USING SENSI
Congratulations on successfully installing Sensi.
Press Start Using Sensi to open the main screen of the app.
TROUBLESHOOTING
Why isn’t my heating/cooling turning on?
- Ensure that there is power to your HVAC system and there is no error code on your control board indicating a system issue.
- If there is an error code or no power to your system, contact an HVAC professional to service your equipment.
- Reset breakers.
- Make sure the furnace/air handler door compartments are securely screwed down and closed. If the door panels are not secure, the system will not start.
- Secure wire connections.
- Ensure the thermostat is wired correctly by following the instructions in the Sensi app.
- You can also try to reinstall your original thermostat to make sure there is not an HVAC system issue that is preventing the system from turning on. If your heating/cooling doesn’t come on with the original thermostat, you may need to contact a professional technician to service your equipment.
Connecting to Wi-Fi troubleshooting
If you’re having trouble connecting to Wi-Fi, here are some tips to try:
- Make sure the Sensi app is up-to-date and running the latest version available in your app store.
- Reboot your smartphone.
- Reboot your router by unplugging it from the wall for a few minutes and then plugging it back in.
- Make sure Bluetooth is turned on in your phone settings and is allowed in the Sensi app permissions.
- Make sure Location access is turned on in your phone settings and is allowed in the Sensi app permissions.
- Try another smartphone or tablet. Simply download the Sensi app and sign into the app using the email address and password you used when you created your account.
Reconnecting to Wi-Fi
If you replaced your router or changed your Wi-Fi network password, you will need to reconnect your thermostat to Wi-Fi. This process is different depending on what smart device you are using. Please see our support article for more information on how to reconnect.
sensi.emerson.com/en-us/support/reconnecting-sensi-thermostat-to-wifi
HVAC configuration menu
If you want to check that your thermostat’s HVAC settings were configured correctly or you’re experiencing a system issue, refer to the chart for equipment descriptions and options. Learn more about how to properly configure your thermostat here: sensi.emerson.com/en-us/support/how-do-i-configure-my-thermostat
Accessing your Sensi thermostat from other devices
When you log into your Sensi account with your email address and password, the app will be able to control all the thermostats registered to your Sensi account.
If you give someone else your email address and the password to your Sensi account, they will be able to log in and control any thermostats registered to that account. You can change your email address and password from inside the app. Be aware of this when giving out your information. There is no limit to the number of devices that can access the thermostat.
Forgot password
If you forget the password to your Sensi account, click on Forgot Password on the login screen of the Sensi app. A temporary password will be sent to the email address that you use to log in.
| CONFIGURATION MENU ITEMS REFERENCE | ||
| Menu item | Description | Options |
| Outdoor Equipment | Select AC or Heat Pump equipment | AC/HP/– |
| Indoor Equipment | Select whether the equipment is an electric or gas furnace, or fan-only. Set this to EL for single-stage electric for GA single-stage gas systems or FN for fan-only systems | GA/FN/EL |
| Reversing Valve or Multistage Position | When configured for O, the reversing valve is energized in Cooling. This will cover most applications. Some manufacturers, such as Rheem orRuud, use the B terminal, which would energize in Heating. For three-wire zone hydronic systems set this to 6. | O/B/2H/2C/6/– |
| Multistage Equipment | When configured for 2C, second-stage cooling is energized. When configured for 2H, second-stage heating is energized. | 2H/2C/6/– |
Installing multiple thermostats
If you are installing more than one thermostat, follow the same installation process in the Sensi app. Once you have one thermostat installed, open the Sensi app on your phone. At the main screen, press the + sign to add another thermostat to your account.
Accessing account information
You can use the Account area to access your email preferences and change your account information and the email address associated with your Sensi.
- For iOS: Tap the person icon in the upper right corner.
- For Android: Tap the three dots in the upper right corner.
Technical support
For problems installing your Sensi thermostat, visit our support site. We have a vast collection of troubleshooting articles aimed at helping you install Sensi and use its features. We also have a support team available to help assist you.
sensihelp.com
Notes
CONVENTIONAL SINGLE-STAGE OR MULTI-STAGE SYSTEMS (NO HEAT PUMP)
HEAT PUMP SYSTEMS
Reference
Download Manual
sensi 1F76U-22WFB Series Lite Smart Thermostat Installation Guide
Emerson 1F76U-22WFB SENSI LITE SMART THERMOSTAT Installation guide
Emerson 1F76U-22WFB SENSI LITE SMART THERMOSTAT Installation guide