6iE Smart Thermostat
The Warmup 6iE Smart Thermostat is a Wi-Fi thermostat for electric underfloor heating systems that can be controlled remotely through the MyHeating app. Its SmartGeo feature adjusts heating based on occupancy, location, and local weather forecast. The 6iE carries a 12-year warranty. The FAQs below cover setup, app control, programming, troubleshooting, and more.

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1 6iE Troubleshooting 2025
Are you experiencing an error on your thermostat? Read this guide for tips on 6iE troubleshooting.
Learn more2 Is it normal if I hear a clicking noise from my thermostat?
The clicking noises are the relay opening and closing to let the power through to the heating system. While it should be hardly noticeable, it can be reduced by insulating the surrounding of the electrical…
Learn more3 What does “ER1” on the thermostat display mean?
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…
Learn more4 What does the triangle with an exclamation mark (!) on my 6iE mean?
If the 6iE displays a triangle with an exclamation mark (see below) a limit temperature has been set and it has been achieved.
Learn more5 What is the Control Period mean on my Warmup 6iE?
The "Control Period" checks the difference in the current measured temperature and the set temperature in a proportional-integral algorithm to maintain a steady temperature.
Learn more6 Why is my floor heat not working even though there are no error messages on my thermostat?
Discover why your floor heat is not working despite there being no error messages showing on your thermostat. This guide explains common causes of heating issues and troubleshooting tips to restore your system.
Learn more7 Why is my floor temperature reading incorrect?
If your floor temperature reading varies significantly from the actual temperature of the floor, it could indicate an issue with how the sensor probe was installed. Continue reading to learn how to identify and fix…
Learn more8 Why is my thermostat flashing?
Is your thermostat display flashing? We'll be happy to help get you on the right track in this quick post.
Learn more9 Why wont my 6iE connect to internet?
Are you experiencing issues connecting your 6iE to WiFi? Find some useful tips for resolving this issue here in this post.
Learn more10 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…
Learn more11 Where do I place the sensor probe when installing in-slab cable?
The thermostats sensor probe can be installed in a number of ways and must be housed in a separate conduit from the heating systems cold tail lead. Click "Read More" for details.
Learn more12 Make sure that the floor probe that came with the floor heating thermostat was installed and done so properly.
It is vital that the floor heating thermostat's floor probe was not only installed but done so the right way. Click "Read More" for details.
Learn more13 Can I add a 4iE and a 6iE on my MyHeating account?
Yes! All smart thermostats by Warmup are compatible with the MyHeating app for easy control of your underfloor and electric baseboard heating.
Learn more14 Can the MyHeating app have multiple users?
It’s possible to ‘share’ a location with another user. This is done through the web portal in the ‘edit location’ section. Here, the user can add more users to their location. Invitation access is sent…
Learn more15 How do I change my password using the MyHeating app?
In this guide, we will provide you with instructions on how to change your password using the MyHeating app. Whether you prefer following a video tutorial or written instructions, we have got you covered. Changing…
Learn more16 How do I change the language using the MyHeating app?
There are two ways to change the language using your MyHeating app.
Learn more17 How do I set a program using the MyHeating app?
This guide will walk you through the process of setting up and programming your MyHeating app to ensure maximum comfort and energy efficiency in your home. Setting a program allows you to set comfort temperatures…
Learn more18 How do I set into Manual Mode on the 6iE Smart Thermostat?
Setting into “Manual” mode allows you to set a fixed target temperature for the thermostat to achieve. The thermostat will continue to maintain this temperature until another operating mode or temperature is selected.
Learn more19 How do I set the time and date on my thermostat?
Setting the time and date on your thermostat is a crucial step in ensuring the proper functioning of its programming features. Accurate time and date settings allow your thermostat to regulate temperature and energy usage…
Learn more20 How do I set the time and date on the 6iE?
Setting the time and date on your 6iE is important for proper program function. Follow along with the below video or instructions to set yours.
Learn more21 How do I turn WiFi off on my 6iE Smart Thermostat?
The 6iE is only available in Smart WiFi. If you prefer to use your 6iE without WiFi, the video/instructions below will show you how to turn it off.
Learn more22 How do I upload a background to my thermostat using the MyHeating app?
Uploading a background using the MyHeating app is an effortless process. If you'd like to learn how to do so, follow the simple steps down below.
Learn more23 How does the open window function on my Smart Thermostat work?
The open window function is a setting on your thermostat that will detect when a nearby window is open, letting in outside air and will adjust the temperature accordingly. TRIGGER ON: A Windows open…
Learn more24 How to check my daily usage through the MyHeating app?
In this guide, we will take you on a journey to explore the powerful Daily Usage feature of the app, specifically designed for your Warmup 6iE/4iE thermostat. By following these instructions, you will unlock the…
Learn more25 How to perform a manual override using the MyHeating app?
We will guide you through the step-by-step process of accessing the manual override function through the MyHeating app. You'll learn how to make real-time changes to the temperature, switch between heating modes, and even create…
Learn more26 How to turn on frost protection using the MyHeating App?
In this guide, we will walk you through a simple process to deactivate the SmartGeo feature, turn off the heating, and disable the frost protection on your device. By following these instructions, you will have…
Learn more27 What is Manual Mode?
Setting into manual mode allows you to set a fixed target temperature for the thermostat to achieve. The thermostat will continue to maintain this temperature until another operating mode or temperature has been selected.
Learn more28 What is the lock icon on my 6iE Smart Thermostat?
The lock icon on the 6iE Smart Thermostat represents that the thermostat has gone into standby mode. It will show at the bottom center of your thermostat.
Learn more29 How do Warmup thermostats work?
Wondering how Warmup thermostats work? Learn all about how they work by reading more here.
Learn more30 What are heating limits?
Heating limits are commonly referred to when it comes to underfloor heating. If you are wondering what heating limits are and how to manage them.
Learn more31 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.
Learn more32 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…
Learn more33 Can I upgrade to the 6iE?
Do you have an old Warmup thermostat that you'd like to upgrade to the 6iE? Learn all you need to know in this post.
Learn more34 Can my sensor probe be extended?
Yes, please click "Read More" for details.
Learn more35 Thermostat Mounting
Are you installing a Warmup thermostat and looking for mounting information? Find the mounting diagrams you need here in this post.
Learn more36 Can you trim the floor sensor?
The floor probe wire can be trimmed. Learn more here.
Learn more37 How do I register a product warranty?
If you are finalizing a Warmup installation it is almost time to register your warranty! Find the link here to the warranty registration page.
Learn more38 Where do I place the sensor probe when installing the DCM-PRO cables?
This page outlines the recommended installation methods for your installing your sensor probe.
Learn more39 Can my thermostat connect to Google Home?
Yes, your thermostat can connect to your Google Home. Read the instructions down below to find out how!
Learn more40 How can I turn my system on or off completely?
Powering off your thermostat is an important function to be familiar with, as it allows you to completely shut down your system when needed. Whether you prefer visual guidance or step-by-step instructions, we have you…
Learn more41 What are the dimensions of the 6iE custom background image?
The 6iE custom background screen dimensions are 3 1/2 inches diagonally. However, image scaling is not required thanks to auto-scaling when you upload your custom background.
Learn more42 Why does my thermostat set into open window function and decreases my set temperature?
Welcome to our informative post on learning more about the open window function on your Warmup Smart Thermostat. Follow along down below to read more about this function.
Learn more43 Can my thermostat connect to 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…
Learn more44 How many relays can a single thermostat control?
If you are planning for a large project, Warmup recommends limiting the number of relays controlled by a single thermostats to 5.
Learn more45 How far away from the thermostat can the relay be mounted?
Are you wondering about the mount location of your relay? Learn more about mounting your relay in this post.
Learn more46 Do Warmup Thermostats Need Wi-Fi? Smart Home and Matter Compatibility
Matter, previously known as Project Connected Home over IP (CHIP), is now compatible with Warmup's new 7iE floor heating thermostat. Click to learn more.
Learn more47 How Do I Identify Which Warmup Thermostat I Have?
Do you have a Warmup Thermostat but are unsure which model you have? Read this post to help identify which model you have installed.
Learn more48 How to Set a Weekly Heating Schedule on Your Warmup Thermostat
Learn how to both set and delete a weekly programming schedule on your Warmup 7iE Smart Thermostat.
Learn more49 How to Test the GFCI and Fix a Ground Fault Error on a Warmup Thermostat
That "Ground Fault" error on your thermostat after several years could indicate your floor heating system had been damaged during installation. Click "Read More" to learn why.
Learn more50 Do Warmup thermostats zone?
If you are looking to heat multiple spaces separately, you will require multiple thermostats. Read more in this post about zoning.
Learn more51 Does every room with floor heat need its own thermostat?
Want to learn more about the thermostat requirements for floor heating? This post explores several factors you should consider.
Learn more52 How big is the 6iE?
Are you looking for the dimensions of the 6iE? Find a detailed diagram with all the dimensions you are looking for here in this post.
Learn more53 What is the maximum load of the 6iE?
Wondering about the maximum load of the Warmup 6iE thermostat? Find the information you are looking for here in this post.
Learn more54 What kind of heating is the 6iE compatible with?
Curious about what types of heating systems the 6iE thermostat is compatible with? Find your answer here in this post!
Learn more55 Does Warmup work with other thermostats?
Are you searching for a thermostat to use with your underfloor heating system? Learn more about compatibility here!
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