4iE Smart WiFi Thermostat

Home / Bathroom Collection

Controlled from a smartphone, tablet or computer, the 4iE Smart WiFi Thermostat learns how you use your heating and the unique way your house reacts. Download MyHeating app on the app store or connect to the web portal my.warmup.com. Comes with a 3-Year warranty. For the portrait manual, click here.



Would you like to learn more ?

How to: Initial 4iE Programming


In this 4iE programming guide, you will find several useful videos and written instructions. Initial programming is important to get the most from your 4iE.

How do I update the weather on my thermostat?


If your 4iE smart WiFi thermostat is showing an incorrect weather forecast the best thing to do is to confirm the location settings on your My.Warmup account. Sign in here Select “Profile” at the top of the home page Scroll to “My Locations” Do you have more than 1 location listed? Setting up more than […]

How do I get into my thermostat if I forgot the password?


The 4iE thermostat has a lock feature. If you have locked your thermostat and can not get back in, this post will help you!

How to Unregister your 4iE Thermostat


Moving or expecting new renters? Learn how to unregister your 4iE thermostat so that the new owners or renters can utilize the units WiFi capabilities.

How to Edit Currency Type on your 4iE thermostat


Is your energy monitoring feedback in the wrong currency? Learn how to easily edit the currency type on your 4iE thermostat.

How to switch from Celsius to Fahrenheit (or vice versa) on your 4iE thermostat


Is your thermostat reading in Celcius when you want it in Fahrenheit or the other way around? Follow these easy steps for switching the temperature format.

How to Edit Energy Cost on your 4iE thermostat


Do you need to edit something about your energy monitoring feedback on the 4iE? Learn how to easily edit these settings here.

ER1 on the Thermostat Meaning


The ER1 message will also occur if no floor sensor is connected to the thermostat. Have your electrician make sure that the sensor probe wires are securely connected in ports 1 and 2 of the thermostat. If sensor was not installed, your thermostat can be programmed to read the air temperature instead by following the steps below.

Mounting a 3iE/4iE thermostat in Canada


In order to properly mount your 4iE thermostat, you will need a back-box as well as a mud-ring. Warmup can recommend compatible items.

Control of Baseboard Heaters by the 4iE


This page explains how to wire and program the 4iE thermostat to work with baseboard applications.

Reset or Power Cycle my 4iE?


First, loosen the screws at the bottom of your unit at shown in the video clip below. Then remove the face of your thermostat by lifting up and off. On the back of the face is a small reset button. Using a small screw driver or writing utensil, press and hold the reset button for 15 seconds. Then place the face of the unit back on making sure the 8 gold pins line up correctly with their counterparts.

How Do I Set the 4iE to Program Itself?


The 4iE® Smart WiFi thermostat, and non-WiFi version, learn the heat-up and cool down rates of your home to automatically set the most efficient temperatures when you’re away, reducing usage by up to 25%.

4iE Features Only Available through the MyWarmup Portal


Some features are currently only available through the MyWarmup portal. Click “Read more” to see which ones.

Why is my 4iE Showing an ‘!’ on the Screen?


Ensure you have created your account and registered the thermostat using the Device Number. Click “Read More” for details. 

What Type of WiFi Does the 4iE Use?


Click “Read More” for details.

Does Warmup Underfloor Heating Comply with Title 24?


The California Title 24 Building Energy Efficiency Standards are designed to ensure new and existing buildings achieve energy efficiency and preserve outdoor and indoor environmental quality. We have included below useful information regarding underfloor heating and Title 24. To ensure compliance, please consult with a building professional.

Can the 4iE be used with Alexa?


To connect, please make sure you have downloaded the Alexa App and that your Amazon device is fully registered and connected to the Wi-Fi. In addition, you will need to make sure that your my.warmup.com account has been set up and your 4iE is connected. Once connected, open the app and go to the Skills in the menu. Find the skill Warmup 4iE and select Enable. 

How do I turn off the Backlight on my 4iE Thermostat?


Follow these steps to turn off the backlight feature: Menu > Settings > Display/Audio > Display Brightness > Standby set to ‘0’ > Accept

What is System Power on my 4iE?


System Power is requested during the initial setup of your device. System power is simply the wattage of the heating system that you connect to your thermostat. To set your systems power select the following: menu > energy monitor > power settings > select the wattage using the up and down arrows > accept.

How do I Set a Custom Program on my 4iE?


Then you will select the days of the week you would like to program to apply for, press ‘accept’ and then add periods of times you would like the system to be on and heating. The following menu will allow you to set times and temperatures. Lock in your program by pressing accept twice.

Where Do I Find my 4iE’s Device Number?


First, the device number shows up during the initial startup menu and recommends the number be written down. Secondly, it can always be accessed afterwards on the device itself.

How Do I Enable to SmartGeo Feature on the MyHeating App?


The Warmup SmartGeo is a way to allow your thermostat to combine the location settings on your device, occupancy sensing features and a few algorithms to create the most comfortable heat as efficiently as possible.

How to Set Up a Program using the MyHeating App?


Once your profile and 4iE are registered, you can now set up or edit a program through the MyHeating App. Note: You can set multiple different programs for different days. Refer the the video below for further guidance.

How Do You Add a Room using the MyHeating App?


There are two ways to add a Room to your account, which will serve as a way to register your 4iE thermostat to your profile.

The first way is through the my.warmup.com profile and the second way is directly through the MyHeating App.

Does the 4iE have a Battery Backup?


Periodically the programming and date/time are stamped to a section of internal memory. This is then overwritten when the next stamp takes place. When the power is resumed following a power outage, the device will revert to the most recent stamp taken.

When Should I Select Air vs. Floor when Programming my 4iE Thermostat?


You can opt into using the air probe instead of the floor probe if you are more concerned about trying to achieve a specific air temperature, usually for primary heat.

What Home Automation Systems are the 4iE Compatible with?


Currently, the 4iE is compatible with Crestron and Control 4 home automation systems. Please contact the Warmup technical department for related documentation and drivers required to integration.

Mounting 4iE Thermostat (or 3iE) with Std. Back Box/Mud Ring


In order to properly mount your 4iE thermostat, you will need a back-box as well as a mud-ring. Warmup can recommend compatible items.

Why won’t my background picture upload on my 4iE?


This post explains the size requirements of the image file you are trying to upload as a 4iE background.

Can baseboard heaters be controlled by the 4iE?


This page explains how to wire and program the 4iE thermostat to work with baseboard applications.

Why does my thermostat read a percentage?


When applied, you will select a number and this percentage represents the number of minutes the heat will be on out of every 10 minute cycle. For example, if you select 60%, the heat will be on for 6 minutes, followed by 4 minutes of the system being off. Then, after the 4 minutes, it will activate again for 6 and so on. This will continue until your programmed heating period ends or until you manually turn off the heat.

What does the ‘!’ mean on my 4iE Screen?


This may also mean that you have not yet registered the actual thermostat under your location as a room. Please make sure you have added a room, which requires you to enter the thermostats unique device number to fully register. 

Internet to 4iE: How to Connect the 4iE to the Internet?


It connects through WiFi to your router. Click “Read More” for details.

How do I upload a custom background to my 4iE?


The 4iE® is offered in White & Black. It is designed to look great in both modern and traditionally styled homes, with glass effect front faces and beveled chrome edges to reflect wall colors.The large color touchscreen can be customized with different themes and custom up-loadable photo backgrounds* to complement your wallpaper. There’s even a 7-day local weather forecast built in*. (*WiFi version only)

How do I set the 4iE to program itself automatically?


The 4iE® Smart WiFi thermostat, and non-WiFi version, learn the heat-up and cool down rates of your home to automatically set the most efficient temperatures when you’re away, reducing usage by up to 25%.

How do I switch from Celsius to Fahrenheit?


On the thermostat unit: menu > settings > heating preference > temperature format > Choose F° > accept

Can I use the 4iE to control my Air Conditioning unit (A/C)?


The 4iE is designed for use with heating only and is not capable of controlling air conditioning units.

Can I swap my 3iE to a 4iE?


Yes, the box and mounting requirements are identical and the sensor is compatible.

Can I connect it to my smarthome system?


Current compatible home automation systems include Crestron and Control4. Contact Warmup for those drivers required to integrate the 4iE. 

If I’ve Registered an Account, Why Does my 4iE Still Have an ‘!’ on the Screen?


It could also mean that your thermostat is connected to the internet but you have not registered the device as a room on the myheating app or the my.warmup portal. In this instance, you will need to gather your 4iE’s device number and enter a room at your location on your profile. 

Connected to the internet and getting the 4iE ! message?


Ensure you have created your account and registered the thermostat using the Device Number. Click “Read More” for details. 

Why Won’t My 4iE Connect to the Internet?


Check you are using a WPA2 password format (less than 10 characters) on your network. Click “Read More” for details.

What does it mean if my thermostat reads “overload” on this display?


The overload message will occur if more than 15 AMPS has been connected to the thermostat. Click “Read More” for details.

Is an electric floor heating thermostat the same as regular thermostats?


No, floor heating thermostats are specifically designed to control electric floor heating systems.