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nSpire Touch WiFi (UWG4)

nSpire Touch WiFi (UWG4)

The nSpire WiFi thermostat offers all the things you expect from a smart touchscreen thermostat – voice control (works with Hey Google and compatible with Amazon Alexa, adaptive control and intuitive operation.
This support page provides publications, manuals, videos, support articles, and common support questions for the nSpire Touch WiFi product line.

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Support Questions

Showing 10 of 40 questions

The breaker and wire sizes are selected based on the total amperage of the WarmlyYours heating system connected to a single thermostat. This information is on the WarmlyYours heating system's installation plan, electrical plan, or UL label. Based on guidelines from the National Electrical Code: loads up to 16 Amps may utilize 12 gauge wire with a 20-Amp breaker, and loads up to 12 Amps - 14 gauge wire with a 15-Amp breaker. Local code and/or other factors may change these guidelines.

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In theory, it is possible, if no other options are available. We do not recommend it, but If the thermostat is controlling the floor temperature with a floor sensor, then it can go on an exterior wall. It is important that the floor sensor gets located in an area of the floor not hit by sunshine.

If the thermostat will be controlling the air temperature with the built-in ambient sensor, then it should go on an interior wall.

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The default is 10k. If this is a new installation, that is the answer. In the very rare occasion that this is replacing an older Energy stat (eg. square OJ Microline from before 2010 with red and green sensor wires), choose 12k. If this is a replacement for the other 99% of the thermostats WarmlyYours sold (Honeywell TH115 and TH111 thermostats), 10k is the value.

Always start with the default 10kΩ and change later if needed.

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The ground wire in the floor mat must be connected directly to the ground wire of the supply or to the house ground wire.

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Relays can fail due to excessive current or voltage. When a relay is exposed to too much current, the contacts can burn out. High voltage can also damage the coil. Other reasons include mechanical wear and tear, dust or dirt buildup, and moisture. These factors can cause the relay to malfunction or stop working entirely. Regular maintenance and using the relay within its specified limits can help prevent failures.

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A GFCI/GFEP (Ground Fault Circuit Interrupter / Ground Fault Equipment Protection) works differently than a circuit breaker by specifically detecting a small imbalance in electrical current between the hot and neutral wires, which indicates a potential ground fault (like a person touching a live wire), and instantly shutting off the power to prevent shock, while a circuit breaker only trips when there's a significant overload in current flow on the circuit, like a short circuit or too many appliances plugged in.

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Pressing and holding (2-3 sec) physical power/reset button will turn the unit completely OFF. Same process turns the unit back on.

(nHance and nJoin units will have the button on the front faceplate, nSpire Touch WiFi, nSpire Touch and nTrust will have the button on the right side of the faceplate.)

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Check the connections between the thermostat and power module. If the power module is connected incorrectly to the thermostat, the power module won't switch off.

USG Power Module Connection Diagram


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No, a circuit breaker will NOT protect against a power surge; a circuit breakers primary function is to protect against excessive current flow (overload), while a surge protector is specifically designed to handle voltage spikes, which are what power surges are considered to be.

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Please follow the interactive guide below:

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The flashing digits indicate that the actual (measured) floor temperature exceeds the thermostat temperature limit.

The temperature limit is set for either tile (104°F/40°C) or laminate (82°F/28°C) when the thermostat is first set up or re-configured.

For example: When the floor type (protection) is set to laminate, the limit defaults to 82°F/28°C. If the floor temperature goes above this - whether due to radiant floor heating or external heating sources, then the digits will flash and the heating is switched off.

Turning the temperature up or down will not affect the flashing digits. And leaving the thermostat alone with flashing digits does not harm the system.

Tip: To turn off the heated floor (ex. for months when it is not needed), on the outer edge of the thermostat, depress the lower right side button for 3-5 seconds. This will also turn it back on.

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Yes, the Touch and Wifi units will keep the time, there is a back up battery that will last quite a long time.  No need for resetting the clock in event of power outage.

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Yes, this model is dual-voltage and compatible with both 120V and 240V systems. However, ensure your supply voltage matches the voltage requirement of your specific floor heating element (e.g., do not connect 240V power to a 120V heating mat).

For a visual guide on these thermostats, you might find this video helpful:
... OJ Microline UWG4 and UDG4 Touch thermostats overview ...

This video details the features and installation concepts for the UWG4/AWG4 series, confirming its dual-voltage capabilities.

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Yes, radiant floor heating can be a primary heat source if its heat output exceeds the room's heat loss. For best results, we recommend using a 15-watt system, covering at least 80% of the floor, and ensuring the space is well-insulated. Use our Heat Loss Calculator to verify your specific needs.

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Yes, radiant floor heating is an excellent primary heat source for tiny houses in mild to moderate climates. Because tiny houses have small footprints, the 15-watt output of TempZone™ can easily maintain comfort while saving valuable wall space. Ensure the structure is well-insulated and use our Heat Loss Calculator to confirm.

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No, the RC-40AMP is controlled by a line voltage (120V/240V) thermostat.

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Yes, the floor sensor wire can be extended up to 300 feet with 18 AWG wire.

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Yes, we strongly recommend installing insulation like ThermalSheet™ over concrete slabs. Concrete acts as a "heat sink," absorbing warmth that should go to your floor. Insulation directs the heat upward, significantly improving efficiency, reducing warm-up times, and allowing the system to function effectively as a primary heat source.

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Underlayment is recommended for floating floors (laminate, LVP, wood) and installations over cold subfloors like concrete. It provides thermal insulation to prevent heat loss and improves system efficiency. For tile and stone, the system is typically embedded in thinset, so a separate underlayment is often unnecessary.

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Yes the adaptive function is reset during a factory reset.

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See attached document for full description.  OJ App can be found on the App store under "UWG4".

https://www.warmlyyours.com/en-US/publications/NSPIRE-TOUCH-WIFI-SETTINGS-AND-REMOTE-CONTROL-SETUP-GUIDE-A.pdf

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WarmlyYours TempZone™ Flex Rolls and Easy Mats deliver 15 watts per square foot, the maximum allowed by the National Electrical Code. This provides 25% more heating power than the 12-watt industry standard. TempZone™ Cable can be spaced to deliver between 8 and 15 watts per square foot depending on your needs.

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Connecting to Amazon Alexa

Once a WiFi connection has been successfully setup and the OJ Microline UWG4 App associated with the thermostat, it can be connected to an Amazon Alexa home system.

  1. Open the Amazon Alexa App
  2. Click “+”
  3. Click “Device” from the "Add" screen
  4. Find and select “Thermostat" under “All Devices”
  5. Choose “Other” under "What Brand is Your Thermostat?"
  6. Select "WiFi" (it may search local WiFi for a short period)
  7. In the 3 options that follow, at bullet #3 select the "Smart Home Skills" link
  8. In Search field, type "UWG4"
  9. Select "UWG4 Thermostat" (If you get choices, Select UWG4)
  10. Select “Enable" to use
  11. Login withg your OJ Microline userid and password
  12. Select "Allow"
  13. It will then work to discover the Alex devices and enable the selection of the desired OJ Microline thermostat when complete

Your thermostat is now connected to the Amazon Alexa system!

Connecting to Google Assistant

Before setting up voice control for the thermostat, you need a Google account that has been connected to the Google Home App.

  1. Open the Google Hoome App on your smartphone or tablet
  2. At the top left, tap "Add" (+) - "Set up Device" - "Works with Google"
  3. Select the manufacturer of the device from the list. Search "UWG4" and select "UWG4 Smart Thermostat"
  4. Follow the in-app steps to complete setup:
  • Sign into the UWG4 app with your logion information
  • Read and accept the grants page
  • The thermostat should now appear as available to be linked to Google Home.
  • Choose the thermostatand click "Next" in the bottom right corner
  • Select a location for your thermostat and cleck "Next"

Your thermostat is now set up and you can try different voice commands using the thermostat name that you chose in the Google Home app.

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To unlock WarmlyYours nSpire Touch Programmable Thermostat from child lock mode: Connect the dots on the touch screen to make the letter "L".

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Forego the app because the password cannot reset there, and go to a web browser and to the website mythermostat.info   Once there, click 'Forgot password'.

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Yes, electric radiant floor heating is ideal for basements because it warms the cold concrete slab and provides consistent heat from the ground up. In well-insulated finished basements, it can serve as the primary heat source, turning a typically chilly space into a comfortable, year-round living area.

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Radiant floor heating can heat a sunroom if the space has high-quality insulation and double-pane glass. Since sunrooms have high heat loss, a 15-watt system is essential. In extremely cold climates or poorly insulated sunrooms, it is best used as a supplemental source to keep the floor comfortable.

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Yes, radiant heating is highly efficient in cold weather. Unlike forced-air systems that lose heat through ductwork and rising air, radiant heat warms objects directly via far-infrared energy. This method is up to 45% more energy-efficient, providing consistent comfort while significantly lowering monthly heating costs in frigid environments.

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Login to mythermostat.info from a web browser to confirm account activation.  A password reset may be required and the web browser login is the only menu that allows this.  Assure the ONLINE, CONFIRMED, and LINKED statuses are all YES; activation succeeded.  You may now proceed to use the mobile device OJ Microline UWG4 app.  If activation did not succeed, contact WarmlyYours Technical support at (800) 875-5285 during normal business hours for assistance.

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This indicates a fault, current to ground. The thermostat has cut off the power for your safety. Please contact your local electrician or WarmlyYours Technical Support.

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Error code "E2" means defective, damaged, or not connected floor sensor. Check connections or replace the sensor if necessary.

Sensor resistance should be in 8kΩ-15kΩ range and can be tested with a digital multimeter on a 20k scale. If the sensor resistance is out of range, it could be damaged. Please note, only one floor sensor can be connected to a single thermostat.

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The best home features for cold climates include a simple gable roof to shed snow, covered entrances for protection, airtight triple-pane windows to prevent heat loss, and radiant heating systems. These features work together to maintain interior warmth, reduce energy bills by up to 25%, and ensure structural safety during harsh winters.

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If the radiant heating system is a WarmlyYours purchased radiant heating system, the Distributor ID is 10266

Otherwise, use Distributor ID 99887

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GFCI can fail for various reasons, such as wear and tear, moisture, corrosion, power surges, faulty wiring, or improper installation. Some of these causes can be prevented by regular inspection and maintenance, while others may require professional assistance. It is important to note that GFCI devices (ex. thermostat, breakers, outlets) should be tested regularly as these do wear out over time.

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Most systems provide only 12 watts per square foot, which often lacks the power for primary heating in cold climates. WarmlyYours TempZone™ delivers 15 watts—a 25% increase. This higher output allows the system to overcome heat loss more effectively, providing reliable primary warmth even when outdoor temperatures drop.

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Follow the on-screen instruction to reset the GFI by pressing the lower right side button.

If the unit continues to trip please contact Tech Support at +1 (800) 875-5285

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