OJ Microline UDG4 Programmable WiFi Thermostat for Electric Floor Heating

Combines smart home control, sleek design, and advanced energy tracking. With a 3.5" touchscreen, intuitive scheduling, and built-in GFCI safety, it’s the perfect solution for managing electric underfloor heating with precision and ease.

$170.00

Availability: Sold In Store - Ships From Store (35 available in store). (More Info)

Shipping: Free to Continental US (More Info)

SKU
MH UDG4-4999
  • Buy 2 for $165.00 each and save 3%

OJ Microline UDG4 Programmable WiFi Thermostat — Smart Touch Control for Heated Floors

The OJ Microline UDG4 Programmable WiFi Thermostat is an advanced, touch-controlled thermostat designed for electric underfloor heating systems. Featuring a sleek color display, intuitive navigation, and smart scheduling, it offers precision temperature control and effortless operation for homeowners and professionals alike.

Built with WiFi connectivity, Class A GFCI protection, and a 3.5" color touchscreen, the UDG4 provides reliable comfort and energy efficiency for tile, stone, laminate, concrete, and wood floors. Its power logging and programmable scheduling help you maintain optimal warmth while tracking energy use in real time.

Key Features and Benefits

  • 3.5" Full-Color Touchscreen — Interactive, easy-to-use interface with smart navigation and clear graphics
  • WiFi Connectivity — Remote access and control via mobile device or web browser
  • 6-Event Programmable Scheduling — Customize your heating cycle throughout the day for maximum efficiency
  • Energy Monitoring — Track and export power usage via QR technology to optimize energy consumption
  • Smart Copy Function — Easily copy schedules from one day to another for faster setup
  • Universal Sensor Compatibility — Works with most existing floor sensors, perfect for retrofit applications
  • Built-In Class A GFCI Protection — Enhanced safety for bathroom and wet area installations
  • Multi-Floor Application — Suitable for tile, stone, laminate, engineered wood, concrete, and vinyl floors
  • 5-Year Clock Backup — Maintains all settings during power outages
  • Modern Design — Slim, elegant profile that blends seamlessly into any room

Specifications

Model UDG4-4999 Voltage Supply 120–240 VAC, 50/60 Hz
Load Capacity 15A maximum (resistive load) Power Output 1,800 W @ 120 VAC / 3,120 W @ 208 VAC / 3,600 W @ 240 VAC
GFCI Protection Class A (5 mA trip level) Temperature Range +41°F to +104°F (+5°C to +40°C)
Floor Limit Range +41°F to +104°F (+5°C to +40°C) Floor Protection (Laminate/Wood) 82°F (27.5°C)
Floor Protection (Tile) 88°F (31.0°C) Ambient Temperature Range +32°F to +104°F (0°C to +40°C)
Control Accuracy (Differential) ±0.7°F (±0.4°C) Regulation Principle PWM / PI
Enclosure Rating IP20 Sensor Type NTC (10 KΩ), 15 ft (4.5 m)
Dimensions (L x W x H) 3.19" x 1.97" x 5.08" Display 3.5" color touchscreen (65K color, resistive touch)

Downloads

UDG4-4999 Programmable WiFi Thermostat - Product Data Sheet
UDG4-4999 Programmable WiFi Thermostat - User Manual
UDG4-4999 Programmable WiFi Thermostat - Product Brochure
UDG4-4999 Programmable WiFi Thermostat - Quick Guide
OJ Microline Electric Floor Heating Product Catalogue
When is My Thermostat Produced
Exchange of Front Plate on UWG4 and UDG4
Troubleshooting Fault Codes Guide

More Information
SKUMH UDG4-4999
UPC796299031565
Non-ReturnableNo
ManufacturerOJ Electronics
Manufacturer Part NumberUDG4-4999
Voltage120/240
Weight (lbs.)0.75
Dimensions (L x W x H)3.19" x 1.97" x 5.08"
Write Your Own Review
You're reviewing: OJ Microline UDG4 Programmable WiFi Thermostat for Electric Floor Heating
Customer Questions
Thermostat black after power went out
Here is a link to the Troubleshooting Guide for the OJ Microline UDG4-4999: https://www.masterwholesale.com/media/Troubleshooting_for_GFCI-Thermostats.pdf You might also want to make sure there is power to the thermostat, a breaker might have been tripped. If the breaker is not tripped check items 7 and 8 on the quick guide showing the GFCI test button (7) and GFCI Reset Button. If these steps do not work consult an electrician. https://www.masterwholesale.com/media/67370B-12-15_UDG4-ADG4-Microline-touch_Quick-Guide_web.pdf   
Version française
Voici la version française du manuel d'utilisation, elle se trouve juste après la version anglaise: https://www.masterwholesale.com/media/OJ_Microline_UDG_user_manual.pdf     
How do you turn off?
These thermostats are not meant to be turned off. If you don't want the floor heat to come on, set a temperature for the floor heating to come on above the max inside temperature of the house. I have attached a copy of the user manualif you would like to read through the settings available with this thermostat. https://www.masterwholesale.com/media/67371-02-15-UDG4+OJ+Microline+touch_GB+web.pdf    
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