Description
Product Overview
The ATVMaster 520814 water heater control circuit board is engineered to deliver precise control and dependable performance for a wide range of Suburban furnace and water heater models. Constructed with a high‑quality green printed circuit board (PCB) and equipped with state‑of‑the‑art capacitors, this board offers superior electrical stability and resistance to thermal stress. Its compact dimensions—6.18 x 4.21 x 3.11 inches—and lightweight design (7 ounces) make it ideal for wall‑mount installations, while the robust mounting type ensures a secure fit. The board operates without the need for batteries, simplifying installation and reducing maintenance requirements. Designed to replace part numbers 520871, 520820, AP4896608, and 33550L, the 520814 model provides a direct, drop‑in replacement that restores optimal combustion efficiency and system reliability.
![[Product front view showing all components]](https://www.strongyou.store/wp-content/uploads/2026/07/35fdbdb9cccd4775a021f05cb55c2ec4.jpg)
Usage
This control circuit board is suited for residential and light‑commercial heating applications where consistent water heating and furnace performance are critical. It excels in environments that demand continuous operation, such as homes with high hot‑water usage, small apartment complexes, and boutique hotels. The board’s advanced monitoring capabilities allow it to adjust flame length and fuel flow in real time, ensuring safe and efficient combustion. Installation is straightforward for qualified HVAC technicians: the board connects to existing wiring harnesses, mounts securely to the wall, and integrates seamlessly with the furnace’s control panel. Its universal compatibility with multiple Suburban series—SW4D, SW6D, SW10D, SW12D, SW16D, and their variants—means it can be deployed across a broad inventory of equipment, reducing the need for multiple spare parts.
Why Choose Us
Choosing the ATVMaster 520814 board means selecting a product backed by rigorous quality assurance processes and a commitment to long‑term reliability. Each board undergoes comprehensive testing, including thermal cycling, voltage tolerance, and load endurance, to guarantee performance under demanding conditions. The premium capacitors are sourced from reputable manufacturers and are soldered using advanced welding techniques that minimize resistance and heat buildup. Our after‑sales support team is available to assist with installation guidance, troubleshooting, and warranty claims, ensuring that customers receive the assistance they need throughout the product’s lifecycle. Additionally, the board’s green PCB not only provides aesthetic distinction but also offers enhanced corrosion resistance, extending the service life of the component in humid or chemically active environments.
Key Features
- Premium capacitors deliver stable power and reduce voltage spikes for smoother operation.
- Green PCB construction resists corrosion and provides a durable, long‑lasting platform.
- Easy wall‑mount design simplifies installation and saves technician time.
- Broad compatibility with Suburban furnace series ensures a single part solves many models.
- Responsive after‑sales support offers expert help and fast warranty service.
FAQ
Is this board compatible with older Suburban furnace models?
Yes, the 520814 board is designed to replace several legacy part numbers, making it suitable for many older Suburban units that use the SW4D, SW6D, SW10D, SW12D, and SW16D series.
Do I need any special tools to install the board?
Installation requires standard HVAC tools such as a screwdriver, wire stripper, and multimeter. No specialized equipment is necessary, and the board includes clear wiring diagrams to guide technicians.
What warranty does ATVMaster provide for this circuit board?
ATVMaster offers a one‑year limited warranty covering defects in materials and workmanship. Customers can contact our support team for warranty claims and receive a replacement board if the issue is covered.
Can this board improve the efficiency of my water heater?
By providing accurate combustion monitoring and stable power delivery, the board helps maintain optimal flame conditions, which can lead to improved heating efficiency and reduced fuel consumption.
Is the board safe to use in humid environments?
The green PCB material is specifically treated for moisture resistance, making the board safe for installation in humid basements or utility rooms where water heaters are commonly located.







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