Emerson Sensi Wi-Fi Thermostat

Emerson Sensi Wi-Fi thermostat is one of the latest and most feature-rich thermostats available. The tool makes controlling the temperature in your home, workplace, and even industrial settings very convenient.

It connects smoothly to your home Wi-Fi network because it is a smart device enabling you to manage it using the Sensi app. Therefore, all you need to do to get started after installing the device is to connect it to the Wi-Fi.

Emerson Sensi Wi-Fi Thermostat

Does Emerson Sensi Need A C Wire?

A smart thermostat is powered by the C wire (common wire), which delivers a steady flow of 24 VAC 9volts AC).

The Emerson Sensi is one of the most economical smart thermostats you can install without a C wire.

It boasts DIY installation and compatibility with Alexa. The C wire is not necessary for the majority of the applications.

Exclusively systems that only provide heat or cooling, heat pumps, or Apple Home kits will require a C wire.

The Emerson Sensi’s archaic appearance can be easily disregarded thanks to Wi-Fi connectivity in favor of its simple controls, which let you schedule your home’s heating from anywhere.

Is Emerson A Good Thermostat?

The Emerson has a lot of good qualities that make it a good thermostat that you can use in the comfort of your home or office. The positive qualities include;

  • The thermostat has excellent manual controls and screen visibility, modeled after the elegant Emerson line’s past designs. To minimize buttons, the majority of other Wi-Fi thermostats feature cluttered screens. Even though they do not look fashionable, vintage buttons are superior for most regular functions.
  • After you finish setup, you can control practically anything you want from your smartphone.
  • This thermostat may be set up to work with practically any type of HVAC system.
  • You have the freedom to design as many or few applications as you want.

How do I use my Emerson Sensi Thermostat?

After installing the thermostat, you should concentrate on establishing a Wi-Fi connection for the device. Choose the menu, then mode on the thermostat.

The Wi-Fi icon and the numbers 00, 11, and 22 will all flash in the upper left corner of the monitor.

These match the Sensi version you now own. You must input the Sensi password, which will be located on the back of the welcome guide or the faceplate, to connect to the Sensi network.

You will be able to connect to your home Wi-Fi using this. You can also give your thermostat a name.

If you have more than one thermostat, it’s better to name them based on the room they may be found.

By entering your home address, you will also have the option of registering your thermostat. If you successfully installed the device, you may choose “start using Sensi” to access the application’s home screen.

You can connect it to your phone through Wi-Fi. You can also set up automation with other smart devices, plan when your heating or cooling turns on, control the temperature of your home from anywhere, and more with the app. 

The thermostat simplifies life. To remove the cold from the fall air, you can program the thermostat to turn on the heat in the morning.

Alternatively, you can program your air conditioner to turn on a few hours before you leave work.

There is no need to get up in the middle of your favorite show to adjust the thermostat, as you can use the Sensi app to adjust the temperatures from your phone. This is beneficial for people who have mobility issues.

How to wire Emerson Sensi Thermostat?

To wire your Emerson Sensi thermostat, you will need to follow the following steps:

Remove the faceplate

Once the faceplate is off, take a photo of the wiring when the plate and the wiring are still connected. This image will be useful for debugging, if necessary, in the future.

Do away with the jumper wires

If any jumper wires are attached to the faceplate or the wall, you can remove them. They are often located on the rear of the thermostat faceplate and resemble a brief U-shaped connection.

To disconnect existing connections, refer to the app instructions

Your older thermostat has wires attached to the terminal labels. Your phone’s application will prompt you to choose the option that is best for you.

You will then be able to identify which wire corresponds to which function. To make it simple to keep track of cables, Sensi also offers tiny stickers that can be used as labels.

Remove the old thermostat

Remove the base of the old thermostat by separating the cables from the thermostat back after disconnecting the wires.

You will reverse this process by installing the Sensi base in its place, fastening the new base to the wall with the included screws, and threading the wires through the base’s center hole.

Sensi base connection

Attach the new base to the appropriate connections to match the appropriate terminals with the wires; use your labels and the app’s settings. Put the lid on and turn the thermostat on.

How do you set up a Sensi WI-Fi thermostat?

Step 1: Add your thermostat to the Sensi app

You are prepared to mount the thermostat to your wall and establish a Wi-Fi connection once you have downloaded the Sensi thermostat app and made an account.

To add a thermostat, click the addition (plus) sign. The following model numbers are compatible with the Sensi smart thermostat option;

  • Series 1F87U-42WF
  • Series ST55

You may find your model number on the thermostat faceplate’s rear

Step 2: is the Sensi thermostat mounted to the wall ready?

The app will ask you if the thermostat is already mounted on the wall. Either select “yes, it is on the wall” or “no, it needs to be installed.”

If you said, “yes, it is on the wall,” all you need to do is to connect the Sensi thermostat to your home Wi-Fi network. Go to step5 for directions. Please proceed with the instructions if you said, “no, it has to be installed.”

Step 3: Remove the outdated thermostat on the wall

Before working with the thermostat wires, turn off the power to your HVAC system. Next, use a screwdriver or the pressure latch to remove the cover.

Some covers are removable with a simple pull, while others need the use of a screwdriver. If you need it later, the Sensi app will remind you to take photos of your current thermostat and old wiring. 

When troubleshooting issues with the technical support staff, this can be useful. You can save the photo you snap to your camera roll or photo gallery.

After that, discard any jumper cables. You will not need any jumper wires from your old device because Sensi thermostats already have one built in. next, choose the terminal labels on your old thermostat that have wires attached to them. 

When you have a valid setting, the app will let you know. Learn more about compatibility if you receive a notice regarding an invalid configuration. A C or common wire is necessary for heat, cool only, and heat pump applications.

Additionally, you can discover more about c-wire installation. Label your wires after selecting the terminal labels for your terminals and your system type. Label your wires by removing one wire at a time and applying the supplied wire label stickers.

Step 4 mark the wire, then fasten the thermostat base to the wall

The Sensi thermostat base should be mounted to the wall using the supplied mounting screws. Install a new base plate.

Step 5 install a faceplate and connect the wiring

After mounting and securing the Sensi base on the wall, put the wires into the terminals. You should push the wires into terminal slots.

Each wire should be fixed in place with a screwdriver. The front display should then the pushed onto the thermostat base.

Restart your power after completing this task.

Step 6 connecting the Sensi thermostat to Wi-Fi

When all this is done, you need to connect your thermostat to WI-fi to start using it for different applications. Connection to the Wi-Fi allows you to control the thermostat through an app.

Does Emerson Sensi Wi-Fi have a battery? If yes, how do you replace it?

Yes, the thermostat does have two AA batteries, which are usually included in the unit when you first buy it, that are needed to operate the device.

Unless your system provides heat or cooling, the battery life is twelve to twenty-four months, and a C wire is not usually necessary.

With smart thermostats, battery life occasionally is an issue because some eat batteries quickly, depending on your type.

The Sensi, however, is surprisingly effective in this field, but you may need to change the batteries at some point. The Sensi thermostat’s batteries should be changed as follows:

  • With both hands, grab the face plate and pull it straight in your direction. The face plate will come apart from the sub-base with a tug.
  • From the faceplate, take out the 2 AA Alkaline batteries.
  • Let the front display turn off.
  • Push the face piece back into the sub-base after replacing it with two new AA Alkaline batteries. It will snap into place when it is pushed on firmly.
  • The thermostat will automatically reconnect to Wi-Fi after 1 to 5 minutes.

Where to download the Emerson Sensi Wi-Fi thermostat manual?

If you are new to the Emerson Sensi thermostat, you may need to use a manual to help you operate or set up the device.

The manual also does contain labeled details about the device, what wires need to be connected to where, and a guide in general on how to use the Emerson Sensi thermostat. You can download the manual online on the main website of Emerson company; sensi.emersion.com.

 Download the Emerson Sense Wi-Fi Thermostat manual here.

You can also get the guide on the Sensi app. all you’ve got to do is install the Sensi app on your phone, and you will be able to access the manual that will help you install the Emerson Sensi thermostat.

The app is available on the google play store for android users and on the apple store for iPhone users.

How to troubleshoot Emersion Sensi Thermostat?

An organized problem-solving method known as troubleshooting is frequently used to identify and resolve problems with sophisticated machinery, electronics, computers, and software systems.

Most troubleshooting techniques start with acquiring information about the problem, such as undesirable behavior or lack of capability that is intended.

The same happens to the Emersion Sensi thermostat at times, and the display or buttons are not responding, and you will need to troubleshoot.

If your thermostat’s keypad doesn’t respond when any button is hit, and the keypad lockout is ON, you can still use the backlight.

You may determine whether Keypad Lockout is enabled by looking for a lock icon on your thermostat’s display and in your app.

You need to reset your Sensi thermostat if the buttons still do not function after you have verified that the Keypad Lockout is turned off or if only part of the display is visible. To reset your thermostat, follow the steps below;

  • Pull the thermostat’s faceplate away from the wall by giving it a slight tug on both sides.
  • When the display screen becomes blank, take out the two AA batteries
  • Place the faceplate back on the wall after replacing the batteries. The faceplate on the wall-connected sub-base should spring into place as you listen.
  • The thermostat ought to reset after a minute.
  • After resetting the thermostat and changing the batteries, if the buttons or display are still not working properly, please take it back to the store where you bought it for a replacement.



 Thermostats are a wonderful innovation, and the Emerson Sensi has advanced technology.

So, it is simple to locate a Sensi thermostat in a contemporary smart home setup. These gadgets are simple to set up and work with most mobile devices.

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