1. Introduction
The CONENTOOL ME83H is a smart WiFi/Zigbee thermostat designed for electric floor heating systems. It allows for precise temperature control in your home or office, offering both manual touch button operation and remote control via a smartphone application. With features like weekly programming, child lock, and power-off memory, it provides comfort, energy efficiency, and convenience.

CONENTOOL Thermostat in a home setting, demonstrating remote control via smartphone app and various temperature settings for different rooms.
2. Safety Information
- Installation must be carried out by a qualified electrician.
- Ensure power is disconnected at the main circuit breaker before installation or maintenance.
- This thermostat is designed for 230V electric heating systems only. Do not use with water underfloor heating or gas heating systems.
- Do not expose the device to moisture or extreme temperatures.
- Keep out of reach of children.

Compatibility diagram: Works with electric underfloor heating only.
3. Package Contents
Please check the package for the following items:
- 1 × CONENTOOL ME83H Thermostat
- 1 × Instruction Manual
- 1 × 3M NTC Sensor Cable
- 2 × Mounting Screws

Package contents of the CONENTOOL ME83H Thermostat.
4. Specifications
| Parameter | Value |
|---|---|
| Brand | CONENTOOL |
| Model Number | ME83H |
| Power Supply Voltage | 230V |
| Current Load | 16A (Electrical Heating) |
| Temperature Sensor | NTC |
| Temperature Accuracy | ±1℃ |
| Temperature Setting Range | 5~90℃ |
| Control Method | WiFi Remote Control / Touch Button |
| Certification | CE |
| Origin | Mainland China |
| Dimensions (L x W x D) | 86mm x 86mm x 40mm (14mm depth) |
| Package Weight | 0.3 kg |

Thermostat dimensions.
5. Product Overview
5.1. Display Elements

Front panel display and controls.
- Signal: Indicates WiFi/Zigbee connection status.
- Room Temp: Displays the current ambient temperature.
- Time: Shows the current time.
- Setting Temp: Displays the target temperature.
- Manual/Automatic: Indicates the current operating mode.
- Press Key: Refers to the touch buttons below the display.
5.2. Control Buttons
- Power Button (leftmost): Turns the thermostat ON/OFF.
- Mode Button (M): Switches between manual and automatic (programmed) modes.
- Time Button (Clock icon): Used for setting time and programming schedules.
- Up Arrow (▲): Increases temperature setting or navigates menu options.
- Down Arrow (▼): Decreases temperature setting or navigates menu options.
6. Installation and Setup
6.1. Wiring Diagram
WARNING: Disconnect power before wiring. Improper wiring can cause damage or electric shock.

Wiring terminals on the back of the ME83H thermostat.
- L1 (Live Input): Connect the live wire from your power supply (230V AC).
- N1 (Neutral Input): Connect the neutral wire from your power supply (230V AC).
- Load (Heating Element): Connect the live wire of your electric floor heating element.
- Load (Heating Element): Connect the neutral wire of your electric floor heating element.
- Sensor (NTC): Connect the two wires of the 3M NTC temperature sensor. The sensor is non-polar, so the connection order does not matter.
6.2. Mounting
The thermostat is designed for standard wall box installation. After wiring, secure the thermostat to the wall box using the provided screws.
6.3. App Setup (WiFi/Zigbee)
To enable smart control features, connect your thermostat to the Tuya Smart or Smart Life app.
- Download the Tuya Smart or Smart Life app from your smartphone's app store.
- Register or log in to your account.
- Ensure your thermostat is powered on.
- Follow the in-app instructions to add a new device. The thermostat will typically enter pairing mode automatically or by holding a specific button (refer to the detailed instruction manual for specific pairing steps).
- Once connected, you can control the thermostat remotely and integrate it with voice assistants like Amazon Alexa and Google Home.

Smart home integration with Alexa and Google Home.
7. Operating Instructions
7.1. Basic Operation
- Power ON/OFF: Press the Power button to turn the thermostat on or off.
- Adjust Temperature: In manual mode, use the Up (▲) and Down (▼) arrows to set the desired temperature.
- Switch Mode: Press the Mode (M) button to toggle between Manual mode (fixed temperature) and Automatic mode (programmed schedule).
7.2. Weekly Programming (5+2 Schedule)
The thermostat supports a 5+2 weekly programming schedule, allowing you to set different temperature profiles for weekdays and weekends.
- Press and hold the Time (Clock icon) button to enter programming mode.
- Use the Mode (M) button to cycle through the programming periods (e.g., Monday-Friday morning, Monday-Friday day, etc.).
- Use the Up (▲) and Down (▼) arrows to adjust the start time and target temperature for each period.
- Repeat for all desired periods (e.g., 6 periods for weekdays, 2 for weekends).
- Press the Power button or wait for a few seconds to exit programming mode and save settings.

Example of 5+2 weekly programming schedule.
7.3. Advanced Features
- Child Lock: Prevents accidental changes to settings. Activate/deactivate by pressing and holding the Up (▲) and Down (▼) arrows simultaneously for a few seconds.
- Power-off Memory: The thermostat retains all settings (time, temperature, program) even after a power outage.

Power-off memory function ensures settings are retained.
8. Maintenance
- Clean the thermostat's display and casing with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Ensure the temperature sensor is not obstructed or covered, as this can affect temperature readings.
- Periodically check wiring connections for tightness, especially after initial installation.
9. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Thermostat not powering on | No power supply; incorrect wiring. | Check main power supply. Verify wiring connections (L1, N1). |
| Heating not working | Thermostat in OFF mode; incorrect temperature setting; wiring issue; heating element fault. | Ensure thermostat is ON and set to a temperature higher than room temp. Check load wiring. Consult an electrician if heating element is suspected. |
| Inaccurate temperature reading | Sensor faulty or improperly placed. | Ensure sensor is correctly installed and not obstructed. Replace sensor if faulty. |
| Cannot connect to WiFi/App | Incorrect WiFi password; thermostat not in pairing mode; router issues; incompatible network. | Verify WiFi password. Put thermostat into pairing mode (refer to manual). Ensure 2.4GHz WiFi network. Restart router. |
| Child lock active | Buttons are locked. | Press and hold Up (▲) and Down (▼) arrows simultaneously for a few seconds to unlock. |
10. User Tips
- For optimal energy savings, utilize the 5+2 weekly programming feature to match your daily schedule.
- Consider using the child lock function to prevent unintended changes to your heating schedule.
- Regularly check the app for firmware updates to ensure the best performance and security.
- When integrating with smart home systems like Alexa or Google Home, ensure the device name in the Tuya app is simple and easy for voice commands.
11. Warranty and Support
CONENTOOL products are manufactured to high-quality standards. For any issues or technical support, please refer to the contact information provided with your purchase or visit the official CONENTOOL website. Keep your purchase receipt as proof of purchase for warranty claims.
