This universal 12V DC ignitor control circuit board is designed to replace the original ignition modules in Suburban, Atwood, and Dometic RV furnaces. It features robust construction with a glass-reinforced epoxy substrate and flame-retardant coating, ensuring reliable operation under the vibration and temperature variations common in recreational vehicles. The board integrates a solid-state high-voltage spark generator and a microcontroller-based timing circuit that precisely controls the ignition sequence and flame sensing cycle. It is compatible with furnaces using a 50-plus pin fan connector, allowing seamless integration with existing wiring harnesses. For older furnaces lacking dedicated fan control, this board adds the ability to manage the fan operation through the wiring harness, improving heat distribution and system efficiency.

The unit operates across a wide input voltage range of 10.5 to 15.5V DC, drawing minimal current during standby. Its compact dimensions (approximately 3.5 x 2.0 x 0.8 inches) fit standard control board compartments without modification. The gold-plated pin contacts resist corrosion and maintain signal integrity over long periods. Each board undergoes functional testing for spark output, flame rectification, and timing accuracy before packaging. Priced affordably, this component offers a cost-effective way to restore or upgrade the furnace ignition and fan control system without replacing the entire heating unit.

The board’s design prioritizes straightforward installation: it uses pre-tinned solder pads and clearly labeled terminal points for power, ground, ignitor, flame sensor, and fan relay connections. A wiring diagram is included to assist with retrofitting older furnaces. The microcontroller firmware implements adaptive timing that automatically adjusts the spark duration based on feedback from the flame sensor, reducing unnecessary sparking once the burner is lit. This feature conserves battery power and prolongs the life of the ignitor electrode. The flame sensing circuit uses advanced rectification technology that distinguishes between a stable flame and false signals caused by electrical noise.

The board also includes a thermal fuse for over-temperature protection, adding an extra layer of safety. For RV owners seeking to enhance their furnace reliability, this ignitor control board delivers consistent ignition performance and extended lifespan compared to factory modules that may suffer from known failure modes like cracked solder joints or degraded capacitors. The affordable price point makes it a practical replacement part, especially when the original module is discontinued or expensive to source. Durability is further reinforced by a conformal coating that shields the circuitry from moisture, dust, and corrosive gases that may be present in propane-fired heating systems. The board’s layout minimizes interference between high-voltage and low-voltage traces, ensuring stable operation even in electrically noisy environments.

It supports both direct spark ignition (DSI) and intermittent pilot ignition (IPI) systems, adapting to various furnace models. The upgraded fan control function allows the user to select continuous fan operation or automatic cycling based on demand, improving comfort and reducing temperature stratification in the living space. With an operating temperature range from -40°F to 185°F, this board is suitable for year-round RV use in diverse climates. The combination of quality materials, precise engineering, and budget-friendly pricing makes this component a wise choice for maintaining or upgrading a recreational vehicle’s heating system. Its compatibility with multiple major brands simplifies the replacement process, and the inclusion of fan control wiring enhances functionality without requiring additional aftermarket parts.