White Rodgers 50A65-843 Module

The White Rodgers 50A65-843 is a universal single stage HSI integrated furnace control designed for professional field replacement across a broad range of OEM platforms including Trane, York, Goodman, Amana, and Lennox. As a silicon nitride ignition module, it utilizes a patented adaptive algorithm to manage 80V nitride ignitors, precisely modulating voltage to extend ignitor life and ensure reliable combustion. For the technician on-site, this integrated furnace control board simplifies the truck stock by replacing dozens of 50A65-series modules. It features diagnostic LED flash codes for rapid troubleshooting and includes essential hardware like a mounting hole template, additional jumpers, and a specialized 3/16-inch terminal for legacy Lennox furnace control applications. The board manages all critical furnace functions, providing dedicated outputs for the PSC blower motor, inducer, gas valve, humidifier, and electronic air cleaner, ensuring a seamless HVACR replacement part solution that maintains factory-level performance and timing.

• Broad Compatibility: Replaces 50A65-120, 50A65-474, 50A65-475, and many others, reducing the need for multiple boards on the truck.
• Ignitor Protection: The 80V nitride adaptive ignition routine maintains optimal temperature to prevent premature element failure.
• Simplified Installation: Includes a diverse wiring harness kit and jumpers to accommodate various cabinet configurations and reach requirements.
• Advanced Diagnostics: On-board LED indicator provides clear fault codes for system lockouts, flame sensing issues, and pressure switch failures.
• Safety Logic: Features a 60-minute auto-reset and a field-replaceable 3A automotive fuse to protect the 24V transformer circuit.

• Can I use this for a 120V ignitor system? No, the 50A65-843 is specifically engineered for 80 volt nitride ignitors. Utilizing it with a 120V carbide ignitor will result in ignition failure or module damage.
• How do I resolve a 3-flash code? A 3-flash LED signal typically indicates a pressure switch stuck open. Verify inducer operation, check for blocked venting, or inspect the pressure switch tubing for moisture or cracks before replacing the board.
• Is the blower timing adjustable? Yes, the module contains dipswitches to configure heat/cool fan-on and fan-off delays, allowing you to match the original manufacturer’s specifications.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.