3iE Energy-Monitoring Thermostat

The 3iE Energy-Monitoring thermostat is a programmable floor heating thermostat that offers precise temperature control. Download Warmup 3iE thermostat user manuals below. Comes with a 3-Year warranty.

What does it mean if my thermostat reads “Ground Fault Error” on the display?

This message will occur if a ground fault is detected. Click “Read More” for details.

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 thermostat. If sensor was not installed, your thermostat can be programmed to read the air temperature instead by following the steps below.

Is it normal if my thermostat makes a clicking noise?

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 box in which it is mounted. You should also ensure that the screws mounting both the box and the thermostat are tight.

What does it mean if my thermostat reads error message “ER2” on the display?

The ER2 message will occur if the floor sensor has a short circuit or has a loose connection. Click “read More” for details.

Why is my floor temperature reading incorrect?

If your floor probe is giving you a reading that is much higher or lower than the actual temperature of the floor, it is possible that your installer put the sensor probe and cold tail lead in the same conduit. Click “Read More” for details. 

What if my thermostat screen is black and won’t turn on?

If your thermostat has no display and will not turn on when power button is pushed, the thermostat could be wired incorrectly. Click here for more details.

Why is my floor not heating but there are no error messages?

If your floor is not heating, you should contact your electrician to do proper troubleshooting. Click “Read More” for details. 

What is causing my thermostat to keep tripping requiring that I press the reset button?

One reason why your thermostat keeps tripping could be that you have GFI on the thermostat and the breaker simultaneously.  Click “Read More” for details.

What does it mean if my thermostat reads “heater error” on the display?

Heater error will occur if the heating system is not properly wired to the thermostat. Please click “Read More” for details.

What if my Sensor probe reading higher or lower than actual temperature?

If the sensor probe is placed too close to the wire, it will read higher temperatures than you will actually feel on the floor. Click “Read More” for details.

Conduit requirements when installing your Warmup system

We recommend using a conduit 1/2 conduit for one lead or a 3/4″ conduit if connecting two systems to one thermostat. In addition, we recommend a separate 1/2″ conduit for the floor sensor.

Does the 3iE have a battery backup?

In the event of a power outage, the capacitor will hold the charge for approx 1 hour, after which time the device will require re-programming.

What does it mean if my thermostat reads “ER 1 Out” on the display?

It indicates that the thermostat is not set up correctly. Click “Read More” for details.

How to wire the 3iE Energy-Monitoring Floor Heating Thermostat

Learn how to wire your 3iE and probe for both 120V and 240V configurations.  Always use a licensed electrican.  Click “Read More” for details.

What does it mean if my thermostat reads “output fault detected” on the display?

It is likely to be a wiring or installation issue. Please consult our installation manual for further assistance. Troubleshooting steps will need to be done with a licensed electrician. Please have the electrician call us on site with the model numbers that were installed and a multimeter for testing.

Can my sensor probe be extended?

Yes, please click “Read More” for details.

Un-Mounting Your Thermostat

Please click “Read More” for instructions on how to un-mount your thermostat

Why is my floor not reaching target temperature?

If your heating system was installed on a concrete slab or over an unheated space and insulation boards were not used, it is possible that the heat loss into the subfloor will cause your floors to heat up more slowly and possibly not reach the target temperature. Click “Read More” for details.

Why does my thermostat trip every time it reaches the same temperature?

The thermostat tripping at the same temperature point could indicate that your system was cut during the time of installation. Click “Read More” for details.

Mounting the 3iE Energy Monitoring Floor Heating Thermostat

Read this before choosing your gang box. Click “Read More” for important information.

What if my thermostat says system is on however the floor is not heating up?

If you installed your thermostat over 3 years ago and it seems to be functioning the same, however your floor is no longer heating up, call your electrician. 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.

Initial Set up of the 3iE Energy Monitoring Floor Heating Thermostat

Warmup’s 3iE is designed to make the initial programming incredibly easy.  Click “Read More” where we outline how to do it.

Do you have to wire the floor sensor probe that comes with the 3iE thermostat?

That floor probe is an important part of having your floor heating system function properly.  Click “Read More” for details.

How can I turn my system on or off completely?

You can turn your 3iE on or off using the button next to the GFCI tab at the bottom. Under your thermostat you will find a flat tab indicating the GFCI status of your thermostat. Next to that tab there is a small button. Hold it for 5-6 seconds to turn it on or off.

Making Temporary Temperature Adjustments

You don’t need to reprogram an entire day to make “temporary” temperature adjustments.  Click “Read More” for step-by-step instructions with pictures.

Programming the Floor Temperature

The “Program Schedule” feature of the 3iE allows you to choose how you want to program your floor temperature settings.  Click “Read  More” for details.

Master/Relay (relay reading ER1)

When setting up a large installation and connecting two or more thermostats as Master and Relays, all devices MUST have a floor sensor hooked up. Click “Read More” for details. 

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.

Why can’t I program my thermostat to read air temperature?

If you have set the floor type to any kind of floating floor, a safety feature in the thermostat will not allow you to increase the target temperature any higher than 81 degrees. Click “Read More” for details. 

Can I have another thermostat act as a Relay?

When you have multiple floor heating systems being powered that require more than 15amps, you can use an additional 3iE as a relay as opposed to purchasing a separate generic relay which Warmup can supply.

How do I turn on my system?

To turn on your system once your thermostat has been installed, simply turn on the breaker. The thermostat screen will light up. After setting the basic parameters of the thermostat, select a steady temperature in manual mode for your first heating period to ensure the product heats up. Refer to the respective programming manuals. Click “Read More” for details.

Can I Install the Thermostat Inside the Shower?

The thermostat cannot be installed in the shower and here’s why.

Basic temperature programming/Setting each day separately

The 3iE allows you to customize your temperature settings on a day-by-day basis.  Click “Read More” for step-by-step instructions with pictures.

Is GFCI required for Bathrooms

Thermostats with an internal GFCI including the Warmup 4iE and WUDG will fulfill this requirement. If a non-GFCI thermostat like our Tempo thermostat is being used, a GFCI breaker will be required. Consult with your local electrician to make sure your installation is properly protected and meets National and Local Electrical Code.

When my screen goes dark, will my floor continue to heat?

Yes! Click “Read More” for details.

When I push the test monthly button on my thermostat, the screen goes red and tells me to call Warmup. Should I be worried?

Not at all. Click “Read More” for details.

Adjusting the time

Need to adjust the time?  Click “Read More” for step-by-step instructions with pictures.