Connected to the internet and getting the “!” message on 4iE Thermostat?

Are you seeing a “!” message on your 4iE thermostat? Ensure you have created an account on the MyHeating Website and registered the 4iE using the Device Number. Upon registering an account, your 4iE will be ready for use over the internet.

For more information, read the 4iE Easy Set Up manual. If you have registered an account and the problem persists, read our further troubleshooting guide.

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Not the error message that is showing up for you? Check out related error message issues below:

• What does the ‘!’ mean on my 4iE Screen?
• What Does the Control Fault Error Message Mean?
• What Does “ER1” on the thermostat display mean?
• Thermostat Reads Error Message “ER2” on the Display?