1. Introduction
This manual provides comprehensive instructions for the RETROSUN replacement remote control. It is designed to operate various Twin Star ClassicFlame TRESANTI Electric Fireplace Heater models. Please read this manual carefully before using the remote control to ensure proper function and longevity.
2. Compatibility
This replacement remote control is compatible with the following Twin Star ClassicFlame TRESANTI Electric Fireplace Heater models:
- 42IF442FGL-B000
- 421F442FGL-B000
- 42MM6659
- 42II042FGT
To ensure compatibility, compare your original remote control with the image below. The replacement remote is designed to function identically to the original.

Image 2.1: Comparison of the replacement remote (left) and the original remote (right). Ensure your original remote matches the design on the right for proper compatibility.
3. Setup and Battery Installation
The RETROSUN replacement remote control requires two (2) AAA 1.5V batteries (not included). No programming or pairing is required; simply install the batteries, and the remote is ready for use.
- Open Battery Compartment: Locate the battery cover on the back of the remote control. Slide the cover downwards to open.
- Insert Batteries: Insert two (2) AAA 1.5V batteries, ensuring the positive (+) and negative (-) terminals align correctly with the markings inside the compartment.
- Close Battery Compartment: Slide the battery cover back into place until it clicks securely.

Image 3.1: Detailed view of the battery compartment, showing the correct orientation for inserting two AAA batteries.
4. Operating Instructions
The remote control utilizes infrared technology for communication with your fireplace heater. It offers a reliable operational distance of up to 8 meters (approximately 26 feet).

Image 4.1: The remote control in use, demonstrating an operational distance of 8 meters from the fireplace unit.
4.1 Button Functions
Refer to the diagram below for an overview of the remote control buttons and their corresponding functions. The buttons are designed for intuitive control of your electric fireplace heater.

Image 4.2: Close-up view of the remote control buttons, indicating their respective functions for power, flame effects, heat settings, and timer.
- Power Button (⏻): Turns the fireplace heater ON or OFF.
- Flame Effect Button (✱): Adjusts the flame brightness or effect settings.
- Heat Setting Button (🌡): Controls the heat output level.
- Timer Button (⏱): Sets the operational timer for the fireplace.
- Display/Light Button (💡): Controls internal lighting or display features.
- Fire/Log Effect Button (🔥): Activates or adjusts the log bed or ember effects.
- Window Open Detection Button (⊔): (Inferred from image) May activate a feature related to energy saving or safety when a window is open.
- Clock/Time Button (🕒): (Inferred from image) May be used for setting the clock or specific timed functions.
5. Maintenance
To ensure optimal performance and longevity of your remote control:
- Cleaning: Wipe the remote control with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Battery Replacement: Replace batteries promptly when the remote's range decreases or it stops responding. Remove batteries if the remote will not be used for an extended period to prevent leakage.
- Storage: Store the remote in a cool, dry place away from direct sunlight and extreme temperatures.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Remote not responding |
|
|
| Reduced operational range |
|
|
7. Specifications
| Model Number | WW918 |
| Brand | RETROSUN |
| Connectivity Technology | Infrared |
| Power Source | 2 x AAA 1.5V Batteries (not included) |
| Operational Distance | Up to 8 meters (26 feet) |
| Material | ABS Environmental Protection Material, Soft Silicon Buttons |
| Dimensions (L x W x H) | Approximately 4.61 x 1.50 x 0.59 inches |
| Item Weight | Approximately 0.704 ounces |

Image 7.1: Dimensional drawing of the remote control, indicating its length (4.61 inches), width (1.50 inches), and thickness (0.59 inches).
8. Important Safety Information
- Do not mix old and new batteries.
- Do not mix alkaline, standard (carbon-zinc), or rechargeable (nickel-cadmium) batteries.
- Always remove exhausted batteries promptly.
- Dispose of batteries properly according to local regulations.
- Keep the remote control away from water and excessive moisture.
- Do not attempt to disassemble or modify the remote control.