1. Introduction
The CONENTOOL Smart Thermostat is designed to provide precise and energy-efficient control over your electric underfloor heating system. It ensures a comfortable room climate while maximizing energy savings. This thermostat is suitable for electric heating systems with a 16A capacity and supports a wide voltage range of 100–240 V, 50/60 Hz. Its high switching capacity makes it ideal for controlling powerful electric heating mats and cables.

A view of the thermostat display, highlighting its WiFi connectivity and smart features.
Featuring intuitive programming and a user-friendly touch display, it allows you to adapt heating operation to your daily routine, ensuring your home is always cozy when you need it to be and saving energy when it's not occupied. The thermostat also integrates with mobile applications like Tuya Smart Life for convenient remote control.

This image shows the thermostat alongside an electric underfloor heating mat, indicating its primary application.
2. Safety Information
Please read all safety instructions carefully before installation and operation to prevent damage to the product or injury.
- Ensure the power supply is disconnected before any installation or maintenance work.
- The device is equipped with switch-off protection and data retention during power outages to maintain settings.
- Utilize the child lock function to prevent accidental changes to settings.
- The thermostat includes frost protection and high-temperature protection functions.
- Constructed from flame-retardant PC material, offering high-temperature resistance and effective flame retardancy for guaranteed safe use.
- Avoid exposing the device to extreme temperatures beyond its operational limits.

This image highlights the thermostat's construction from flame-retardant PC material, ensuring safety and durability against high temperatures (up to 80°C short-term) and cold (down to -10°C short-term).
3. Product Overview
3.1 Key Features
- Precise Temperature Control: Accuracy of 0.5 °C with an adjustable range from 5 to 35 °C.
- Energy Efficiency: Designed for optimal energy savings with programmable settings.
- Wide Voltage Compatibility: Supports 100–240 V, 50/60 Hz.
- High Switching Capacity: Up to 16A, suitable for powerful electric heating mats and cables.
- Intuitive Programming: Flexible 5+1+1 program function for up to seven individual time phases (weekly programmer).
- App Control: Remote control via mobile application (e.g., Tuya Smart Life).
- Safety Functions: Switch-off protection, data retention on power failure, child lock, frost protection, high temperature protection.
- User-Friendly Display: Easy-to-read LCD screen with touch controls.
- Versatile Application: Suitable for hotels, hospitals, schools, homes, and offices.

The thermostat is suitable for temperature control in various environments including hotels, hospitals, schools, homes, and offices.
3.2 Thermostat Components and Display
The thermostat features a clear LCD display and touch buttons for easy interaction. Below is a diagram illustrating the main components and display indicators.

1. Week Indicator, 2. Key Lock Indicator, 3. Room Temperature, 4. Time, 5. Mode Button, 6. Auto Button, 7. Plus Button, 8. Minus Button, 9. Power Button, 10. WIFI Indicator, 11. Heating Indicator, 12. Set Temperature, 13. Manual/Automatic Mode Indicator.

This image highlights features such as low temperature protection, key lock (child safety), data retention during power failures, weekly programming, actual/set temperature display, and mobile app remote control.
4. Setup and Installation
Installation should be performed by a qualified electrician to ensure safety and proper functionality.
4.1 Wiring Diagram
Follow the wiring diagram carefully for connecting the thermostat to your electric underfloor heating system. This diagram is for a 16A electric underfloor heating setup.

Connect L1 and N1 (Load) to terminals 1 and 2 respectively. Connect N (Neutral) and L (Live) from the power supply to terminals 3 and 4 respectively. The external sensor (ß=3950, R25°C=10k) connects to terminals 1 and 2.
4.2 Mounting Steps
Once wired, proceed with mounting the thermostat as follows:
- Connect the power supply box according to the provided wiring diagram.
- Gently push the front panel upwards and then remove it from the backplate.
- Fix the thermostat's backplate into the electrical connection box using screws.
- Align the panel buckle with the fixed plate and press it down until it clicks into place.

This diagram illustrates the process of connecting the power box, removing the front panel, screwing the backplate, and reattaching the front panel.
4.3 Dimensions and Compatibility
The thermostat is designed for standard 86mm mounting boxes or European 60mm mounting boxes.

Front dimensions are 86mm x 86mm. Depth is 40mm, with a 14mm protrusion from the wall. The backplate has a 60mm screw distance and 50mm width, compatible with standard 86mm or European 60mm mounting boxes.
5. Operating Instructions
5.1 Basic Operation
- Power On/Off: Use the Power Button (9) to turn the thermostat on or off.
- Adjust Temperature: Use the Plus Button (7) and Minus Button (8) to adjust the desired temperature.
- Mode Selection: Press the Mode Button (5) to cycle through available operating modes (e.g., Manual, Automatic).
- Auto Mode: Press the Auto Button (6) to activate or deactivate automatic programming.
5.2 Weekly Programming
The thermostat supports flexible 5+2, 6+1, or 7-day programming, allowing you to set up to seven time phases individually for each day or group of days. This feature helps optimize comfort and energy savings.
To set the weekly program, navigate to the programming menu using the Mode button. You can define specific times and temperatures for different periods throughout the day.

This table shows an example of a 5+2 day program with six periods (P1-P6) for Monday-Friday and two periods for Saturday & Sunday, each with a set time and temperature.
| Mode | Switching Point | P1 | P2 | P3 | P4 | P5 | P6 |
|---|---|---|---|---|---|---|---|
| 5+2 Mode | Time | 06:00 | 08:00 | 11:00 | 12:00 | 17:30 | 22:00 |
| Temperature | 22°C | 15°C | 15°C | 15°C | 22°C | 15°C | |
| Saturday & Sunday | Time | 08:00 | 23:00 | ||||
| Temperature | 22°C | 16°C |
5.3 App Control (Tuya Smart Life)
The CONENTOOL Smart Thermostat supports remote control via a mobile application, such as Tuya Smart Life. This allows you to manage your heating system from anywhere.
- Download the "Tuya Smart" or "Smart Life" app from your smartphone's app store.
- Register or log in to your account.
- Follow the in-app instructions to add your thermostat. This typically involves putting the thermostat into pairing mode (refer to the thermostat's display for pairing indicators, usually a flashing Wi-Fi icon).
- Once connected, you can control temperature, set schedules, and monitor your heating system remotely.

This image shows a smartphone screen with the thermostat control interface within the Tuya Smart Life app, demonstrating remote temperature adjustment and mode selection.
5.4 Child Lock Function
To activate or deactivate the child lock, press and hold the designated button (often the Mode or Auto button, or a combination) for a few seconds until the key lock icon appears or disappears on the display. This prevents unauthorized changes to the thermostat settings.
6. Maintenance
The CONENTOOL Smart Thermostat requires minimal maintenance.
- Cleaning: Wipe the display and casing with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Inspection: Periodically check for any loose connections or visible damage. If any issues are found, consult a qualified technician.
- Software Updates: Ensure your mobile application is up-to-date for the best performance and security.
7. Troubleshooting
If you encounter issues with your thermostat, try the following steps:
- No Power/Display Off: Check the circuit breaker and ensure the thermostat is properly wired and receiving power.
- Heating Not Working: Verify the set temperature is higher than the current room temperature. Check the operating mode (ensure it's not in an "off" or "frost protection" mode). Confirm wiring connections are secure.
- Inaccurate Temperature Reading: Ensure the external sensor is correctly installed and not obstructed. If calibration is available, adjust it in the settings.
- Wi-Fi Connection Issues: Ensure your Wi-Fi network is active and the signal strength is adequate. Re-attempt the pairing process through the mobile app. Check if the thermostat's Wi-Fi indicator is active.
- App Control Not Responding: Check your phone's internet connection. Ensure the app is updated to the latest version. Restart the app or your phone.
- Child Lock Engaged: If controls are unresponsive, check for the key lock icon on the display and deactivate the child lock as per section 5.4.
If problems persist, please contact customer support.
8. Specifications
| Feature | Specification |
|---|---|
| Brand | Conentool |
| Model Number | ME86H |
| Voltage | AC 100-240V, 50/60Hz |
| Max Current | 16A |
| Temperature Accuracy | ±0.5 °C |
| Set Temperature Range | 5 - 35 °C |
| Sensor Type | NTC (R25°C=10k, ß=3950) |
| Shell Material | Flame-retardant PC |
| Mounting Compatibility | Standard 86mm or European 60mm mounting box |
| Certification | CE |
| Origin | Mainland China |
9. User Tips
While no specific user reviews or Q&A were provided, here are some general tips for optimizing your thermostat experience:
- Optimize Programming: Experiment with the 5+2/6+1/7-day programming to find the most energy-efficient schedule that matches your lifestyle. Consider setting lower temperatures when you are away or asleep.
- Utilize App Control: Take advantage of the mobile app for convenient remote adjustments, especially if your schedule changes unexpectedly.
- Child Lock: Always enable the child lock if you have young children to prevent unintended changes to your heating schedule.
- Sensor Placement: Ensure the external floor sensor is correctly placed within the heating mat and not exposed to drafts or direct sunlight, which could lead to inaccurate readings.
10. Warranty and Support
Your CONENTOOL Smart Thermostat comes with a 30-day money-back guarantee. If for any reason the product does not meet your expectations within this period, please contact customer service for assistance.
For technical support, troubleshooting, or any other inquiries, please reach out to our dedicated customer service team. Contact information can typically be found on the seller's platform or the product packaging.

