1. Introduction
This manual provides essential information for the safe and efficient operation of your BESTHERM ARIA 1500W Ceramic Dry Inertia Electric Radiator. Please read all instructions carefully before installation and use, and retain this manual for future reference.
2. Safety Instructions
- Ensure the radiator is installed by a qualified electrician in accordance with local regulations.
- Do not cover the radiator, as this can cause overheating.
- Keep flammable materials at a safe distance from the appliance.
- Do not insert objects into the ventilation openings.
- This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety.
- Children should be supervised to ensure that they do not play with the appliance.
- If the power cord is damaged, it must be replaced by the manufacturer, its service agent, or similarly qualified persons to avoid a hazard.
- The appliance must not be located immediately below a socket outlet.
- Do not use this heater in the immediate vicinity of a bath, a shower or a swimming pool.
- This heater is filled with a precise quantity of special oil. Repairs requiring the opening of the oil container must only be made by the manufacturer or his service agent who should be contacted if there is an oil leak.
- When scrapping the heater, follow the regulations for the disposal of oil.
- The heater must be installed so that the switches and other controls cannot be touched by a person in a bath or shower.
- The appliance is equipped with overheat protection. If the appliance overheats, it will automatically shut down.
- The appliance is equipped with a child safety lock.
3. Product Overview
The BESTHERM ARIA 1500W is a ceramic dry inertia electric radiator designed for efficient and consistent heating. It features a ceramic heating core for gentle, homogeneous, and long-lasting heat, even after being switched off. The radiator includes a digital touch control panel with an intuitive LCD screen for easy programming.
3.1. Components and Dimensions

This image shows the sleek, black front panel of the BESTHERM ARIA 1500W electric radiator, highlighting its modern design suitable for various interiors.

The radiator measures approximately 71.4 cm in length, 45 cm in height, and 11 cm in depth. It weighs around 7.6 kg and is suitable for heating areas of 10 to 15 m².

This image illustrates the ceramic heating core, which provides rapid temperature rise, homogeneous heat distribution, and energy-efficient performance.
3.2. Control Panel and LCD Display
The digital control panel allows for precise temperature management and programming. Familiarize yourself with the buttons and display icons:
- Up/Down Arrows: Modulate time, days of the week, temperature, and select Comfort/Eco modes.
- Power Button: Turns the radiator on or off.
- Window Detection Button: Activates/deactivates automatic open window detection.
- 'M' Button: Selects different operating modes (Comfort, Eco, Frost Protection, Programmed modes P1, P2, P3, and Pilot mode P).
- 'PRG' Button: Accesses programming settings for personalized schedules.
The LCD screen displays the current time, temperature, selected mode, and programming schedule. Icons indicate various statuses:
- Frost Protection Mode (Snowflake icon): Maintains an ambient temperature of approximately 7°C.
- Standby Mode (Power icon): Visible when the appliance is powered but not actively heating.
- Comfort Mode (Sun icon): Allows setting a desired temperature.
- ECO Mode (Moon icon): Maintains a temperature 3.5°C lower than the Comfort mode temperature.
- Child Lock (Key icon): Indicates the control panel is locked.
- Open Window Detection (Window icon): Indicates the function is active.
- Heating Indicator (Wavy lines icon): Appears when the radiator is actively heating.
This video provides a visual guide to the various buttons and icons on your BESTHERM ARIA radiator's control panel and LCD screen, explaining their functions for temperature modulation, mode selection, and programming.
4. Setup
4.1. Electrical Connection
This appliance is designed for three-phase connection. Always connect the Neutral (blue wire) and Phase (brown or red wire). The black wire should only be connected for control via a central thermostat. Do not connect to ground.

This diagram illustrates the correct wiring for the BESTHERM ARIA radiator, showing the connection points for the blue (Neutral), brown/red (Phase), and black (central thermostat control) wires. It explicitly states not to connect to ground.
Important: Installation must be carried out by a qualified professional to ensure safety and compliance with electrical standards.
4.2. Wall Mounting
The radiator is designed for wall mounting. Ensure the mounting surface is stable and can support the weight of the appliance. Follow the detailed instructions provided in the separate installation guide for secure attachment.

This image displays the back of the BESTHERM ARIA radiator, indicating the locations for mounting brackets. Proper installation is crucial for stability and safety.
5. Operating Instructions
5.1. Initial Setup and Time Adjustment
When you first power on the radiator, the display will prompt you to set the time. Use the arrow buttons to adjust the hours and minutes. Press and hold the arrow buttons for faster adjustment. You can also set the current day of the week.
This video demonstrates how to set the current time and day of the week on your radiator's thermostat upon its first use or after a power interruption. It shows the use of arrow buttons for modulation and the 'M' button for mode selection.
5.2. Mode Selection
Press the 'M' button to cycle through the available operating modes:
- Comfort Mode: Set your desired temperature using the arrow buttons.
- ECO Mode: Maintains a temperature 3.5°C below the Comfort mode setting.
- Frost Protection Mode: Keeps the room temperature at approximately 7°C to prevent freezing.
- Programmed Modes (P1, P2, P3): Pre-set weekly programs.
- Pilot Mode (P): For advanced control via a central thermostat (not covered in this manual).
5.3. Programming Schedules
The radiator offers three pre-recorded weekly programs (P1, P2, P3) and one customizable program. To access programming, press the 'PRG' button.
- Program 1: Comfort mode from 8:00 AM to 1:00 AM, then ECO mode from 1:00 AM to 8:00 AM, for the entire week.
- Program 2: Differentiated schedules for weekdays (Monday-Friday) and weekends (Saturday-Sunday).
- Program 3: Another differentiated schedule for weekdays and weekends.
To manually program your schedule:
- Press 'PRG'.
- Use the arrow buttons to select the day of the week you wish to program.
- Press 'PRG' again to enter the hourly programming for the selected day.
- Use the arrow buttons to select the desired mode (Comfort or ECO) for each hour of the day. Two black rectangles indicate Comfort mode, one black rectangle indicates ECO mode.
- Repeat for all 24 hours and then for each day of the week.
5.4. Child Lock
To activate the child lock, press and hold the 'M' button for 3 seconds. A key icon will appear on the display. To deactivate, press and hold the 'M' button again for 3 seconds.
5.5. Open Window Detection
The radiator can detect open windows to save energy. To activate this function, press the window detection button. If a sudden drop in temperature is detected, the radiator will temporarily switch to Frost Protection mode. It will return to the previous mode when the temperature stabilizes.
5.6. Power Outage Behavior
In case of a power cut, all programming information is saved. However, you will need to reset the time and day of the week on the thermostat once power is restored.
6. Maintenance
- Always disconnect the radiator from the power supply before cleaning.
- Clean the exterior of the radiator with a soft, damp cloth. Do not use abrasive cleaners or solvents.
- Ensure the air vents are free from dust and obstructions to maintain optimal performance.
- No internal maintenance is required by the user. For any internal issues, contact qualified service personnel.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Radiator not heating. | No power supply, appliance in standby mode, or thermostat set too low. | Check power connection. Press the power button to turn on. Increase the set temperature. |
| Display is blank after power outage. | Time and day settings lost. | Reset the time and day of the week as per initial setup instructions. |
| Radiator switches to Frost Protection mode unexpectedly. | Open window detected. | Close windows/doors. If the issue persists, check the open window detection sensor or deactivate the function if not needed. |
| Control panel buttons are unresponsive. | Child lock is active. | Deactivate the child lock by pressing and holding the 'M' button for 3 seconds. |
| Radiator makes unusual noises. | Normal expansion/contraction of materials during heating/cooling, or loose mounting. | Minor noises are normal. If noises are loud or persistent, check mounting for tightness. If unsure, contact support. |
8. Specifications
- Brand: Bestherm
- Model: ARIA 1500W
- Type: Electric Radiator, Dry Inertia Ceramic
- Power: 1500W
- Color: Black
- Dimensions (L x W x H): 71.4 x 11 x 45 cm
- Weight: 6.7 kg
- Special Features: Overheat protection, Silent operation, Electronic thermostat, Child lock, Open window detection.
- IP Rating: IP24
- Certification: CE
- Heating Method: Radiant
- Power Source: Corded Electric
- Mounting Type: Wall Mount
9. Warranty & Support
9.1. Warranty
This BESTHERM ARIA radiator comes with a 2-year warranty. Please retain your proof of purchase for any warranty claims.
9.2. Customer Support
For any questions, assistance, or after-sales service, please contact our support team:
- Online FAQ: Visit our website for frequently asked questions: www.bestherm.fr/pages/faq
- Telephone Assistance: 03 20 47 05 37
- Email Assistance: sav@hom-y.fr

This image provides the contact information for Bestherm's after-sales service, including their FAQ website, telephone number, and email address, ensuring easy access to support.
You can also find installation and programming videos on our official YouTube channel: BESTHERM YouTube Channel





