---
product_id: 685722479
title: "OJ Microline UDG-4999 Programmable Floor Thermostat with Class A GFCI. Dual Sensing, Dual Voltage (120v-240v). Suitable for Most Electric Radiant Floor Heating Systems, Includes Floor Sensor White"
price: "€ 427.98"
currency: EUR
in_stock: true
url: https://www.desertcart.fi/products/685722479-oj-microline-udg-4999-programmable-floor-thermostat-with-class-gfci
store_origin: FI
region: Finland
---

# OJ Microline UDG-4999 Programmable Floor Thermostat with Class A GFCI. Dual Sensing, Dual Voltage (120v-240v). Suitable for Most Electric Radiant Floor Heating Systems, Includes Floor Sensor White

**Price:** € 427.98
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** OJ Microline UDG-4999 Programmable Floor Thermostat with Class A GFCI. Dual Sensing, Dual Voltage (120v-240v). Suitable for Most Electric Radiant Floor Heating Systems, Includes Floor Sensor White
- **How much does it cost?** € 427.98 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/685722479-oj-microline-udg-4999-programmable-floor-thermostat-with-class-gfci)

## Best For

- Customers looking for quality international products

## Why This Product

- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Description

OJ Microline UDG-4999 Programmable Floor Thermostat with Class A GFCI. Dual Sensing, Dual Voltage (120v-240v). Suitable for Most Electric Radiant Floor Heating Systems, Includes Floor Sensor White

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Item Weight | 0.75 Pounds |
| Shape | Rectangular |
| Style | Modern |
| Color | White |
| Material | Other |
| Specification Met | energy |
| Control Type | Button Control |
| Control Method | Remote |
| Mounting Type | Wall Mount |
| Backlight | Yes |
| Wattage | 3.6E+3 |
| Power Source | Electric |
| Voltage | 240 Volts, 120 Volts |
| Display Type | Manual |
| Controller Type | Thermostat |
| Special Features | Programmable |
| Temperature Control Type | Digital |

## Product Details

- **Brand:** OJ Microline
- **Controller Type:** Thermostat
- **Special Feature:** Programmable
- **Color:** White
- **Temperature Control Type:** Digital

## Images

![OJ Microline UDG-4999 Programmable Floor Thermostat with Class A GFCI. Dual Sensing, Dual Voltage (120v-240v). Suitable for Most Electric Radiant Floor Heating Systems, Includes Floor Sensor White - Image 1](https://m.media-amazon.com/images/I/61SfLE2ytGL.jpg)

## Questions & Answers

**Q: How does this unit connect to the thermostat for the in floor heating. My current unit has the wires connected to the back of the unit.**
A: Hello, this unit has 4 terminals at the back, 2 terminals L(L1) and N(L2) on one end, this is where you connect the power to supply the thermostat, and at the other end you have 2 terminals for the Load (heater) No's 1 and 4.  The thermostat also has an option to connect a floor sensor, this connection is accessible behind the screen.

**Q: I install it and after couple months it says ground is missing what I need to do to fix it**
A: Is it possible the thermostat message is "Ground fault"?  If, during normal operation, the GFCI trips, or thermostat shows "Ground fault", it is possible your heater has a ground fault! 
To check whether it is a ground fault or nuisance tripping, press “Standby/Reset”. If this causes the red LED to stop flashing and stay off, it was nuisance tripping and the system is operating correctly. If this does not occur, there is a ground fault! In case of a ground fault, it is important to have the heater installation checked by a qualified electrician according to local and national regulations.

## Frequently Bought Together

- OJ Microline UDG Programmable Thermostat for Heated Floor w/Class A GFCI - 120/240v in Floor Heater Thermostat - Dual Sensing - Includes a Flooring Sensor - 3-Year Warranty & USA Product Support
- LuxHeat Temperature Floor Sensor for Radiant Under Floor Heating. NTC 10kohm 15ft Probe, Suitable for Most Heating Installations. Compatible with Honeywell Aube Ditra NuHeat SunTouch and More

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**Shop now:** [https://www.desertcart.fi/products/685722479-oj-microline-udg-4999-programmable-floor-thermostat-with-class-gfci](https://www.desertcart.fi/products/685722479-oj-microline-udg-4999-programmable-floor-thermostat-with-class-gfci)

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*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-02-18*