Home / Wiring / 4iE Smart WiFi Thermostat Can I use the 4iE to control my Air Conditioning unit (A/C)? 4iE Smart WiFi Thermostat The 4iE is designed for use with heating only and is not capable of controlling air conditioning units. Underfloor Heating Thermostats Heated Floors Further Questions? Programming - How do I set a program using the MyHeating app? - How to check my daily usage through the MyHeating app? - How to perform a manual override using the MyHeating app? - How to turn on frost protection using the MyHeating App? - How to master changing the language using the MyHeating app in 2 ways? - How do I master changing my password using the MyHeating app? - How do I set the time and date on my thermostat? - What is the lock icon on the 4iE Smart Thermostat? - Internet to 4iE: How to Connect the 4iE to the Internet? - How do I upload a custom background to my 4iE? - Can I connect it to my smarthome system? - Can I have a 4iE and 6iE on my MyHeating account? - Can the MyHeating app have multiple users? - What are the dimensions of the 4iE custom background image? - Can the 4iE be connected to Samsung Home? - How to open the main menu - How to cancel an override - What does cancel heating off mean? - How do I program my thermostat to stay on all night? - How do I connect my 4iE to WiFi? - What is a setback temperature and how do I set it? - How can I adjust the thermostat temperature temporarily? - How do I set the time and date on the 4iE? - How can I tell AM from PM on the 4iE? - What is a fixed temperature and how to I set or change it? - How do I find the MAC address of the thermostat? - How do Warmup thermostats work? - How do I register a 4iE? - How do I enter a space in my WiFi Password on the 4iE? - What are heating limits? - How to: Initial 4iE Programming - Can I turn my thermostat above 86°F? - How do I get into my thermostat if I forgot the password? - Control of Baseboard Heaters by the 4iE - Should I perform a Reset or Power Cycle my 4iE? - How Do I Set the 4iE to Program Itself? - What Type of WiFi Does the 4iE Use? - What is System Power on my 4iE and how can I edit it? - How do I Set a Custom Program on my 4iE? - Where Do I Find my 4iE’s Device Number? - How Do I Enable to SmartGeo Feature on the MyHeating App? - How to Set Up a Program using the MyHeating App? - Does the 4iE have a Battery Backup? - Why won’t my background picture upload on my 4iE? Miscellaneous questions - Are Warmup thermostats compatible with Matter? - Why does my thermostat read a percentage (Regulator Mode)? - Is an electric floor heating thermostat the same as regular thermostats? - How can I turn my system on or off completely? - Can I use the 4iE to control my Air Conditioning unit (A/C)? - How do I upload a custom background to my 4iE? - Can I upgrade to the 6iE? - How do you update software on a 4iE thermostat? - How to change the location setting on the 4iE? - Do I need to use the WiFi on my smart thermostat? - Why is my thermostat screen going dark? - How to Unregister your 4iE Thermostat - How to Edit Currency Type on your 4iE thermostat - How to switch from Celsius to Fahrenheit (or vice versa) on your 4iE thermostat - How to Edit Energy Cost on your 4iE thermostat - 4iE Features Only Available through the MyWarmup Portal - Does Warmup Underfloor Heating Comply with Title 24? - How do I turn off the Backlight on my 4iE Thermostat? - Does the 4iE have a Battery Backup? Preparing for your project - How many relays can a single thermostat control? - Do Warmup thermostats zone? - Does every room with floor heat need its own thermostat? - Does Warmup Underfloor Heating Comply with Title 24? - What are the Conduit Requirements when Installing a Warmup System? Wiring - How many relays can a single thermostat control? - Can I upgrade to the 6iE? - Thermostat Mounting - Can I use the 4iE with another type of heating? - How far away from the thermostat can the relay be mounted? - Can multiple relays be used? - How is the 4iE wired? - Mounting a 3iE/4iE thermostat in Canada - Can baseboard heaters be controlled by the 4iE? Troubleshooting - Ground Fault Error: What does this Mean if my Thermostat has “Ground Fault Error” on the Display? - Why Won’t My 4iE Connect to the Internet? - What if the Sensor Probe Reads Higher or Lower than Actual Temperature? - What does the ‘!’ mean on my 4iE Screen? - What does it mean if my thermostat reads “overload” on this display? - My Floor has No Heat but There Are No Error Messages? - Is it Normal if I hear a Clicking Noise from my Thermostat? - If I’ve Registered an Account, Why Does my 4iE Still Have an ‘!’ on the Screen? - Connected to the internet and getting the 4iE ! message? - Why is my thermostat flashing? - How do I perform a GFCI Test on my thermostat? - Why does my thermostat say test monthly? - What can I do if my old thermostat has stopped working? - Why is my thermostat display sideways? - Why wont my thermostat hold information? - Why is my thermostat stuck on the Warmup screen? - How do I test a floor probe? - ER1 on the Thermostat Meaning - Should I perform a Reset or Power Cycle my 4iE? - Why is my 4iE Showing an ‘!’ on the Screen? - My Floor Heating System Keeps Tripping Installation - How do I check if the cable is working ? - Can my sensor probe be extended? - Can I swap my 3iE to a 4iE or Tempo? - Internet to 4iE: How to Connect the 4iE to the Internet? - Can I upgrade to the 6iE? - Thermostat Mounting - Can you trim the floor sensor? - How do I register a product warranty? - How is the 4iE wired? - Can I mount my thermostat anywhere? - Mounting a 3iE/4iE thermostat in Canada - How Do You Add a Room using the MyHeating App? - What are the Conduit Requirements when Installing a Warmup System? - Can baseboard heaters be controlled by the 4iE?