Nordyne 903106 Control Board

The Nordyne 903106 Control Board is the essential OEM integrated furnace control for managing sequence of operation in Nordyne, Miller, Gibson, and Intertherm gas-fired units. Specifically engineered for G3, G4, G5, G6, and L1RA furnace models, this microprocessor-based board regulates the gas valve, inducer draft motor, hot surface ignitor, and blower motor. For field technicians, this kit serves as a critical direct replacement board for legacy part numbers, including 624591, 624631, and 1012-955A. It utilizes advanced diagnostic LED fault codes to streamline troubleshooting in the field, allowing for rapid identification of pressure switch, limit circuit, or flame sensing failures. Built for high-precision ignition timing and blower control, the 903106 furnace control kit ensures the system meets exact performance specifications across upflow condensing and mobile home applications. This factory OEM Nordyne part maintains system integrity by supervising all safety interventions, including flame modulation and 100% gas shutoff in cases of ignition failure.

• Extensive Cross-Compatibility: This board replaces a wide range of legacy part numbers including 624591-A, 624591-B, 624591-C, 624591-D, 624631, 624631-A, and 624631-B.
• Diagnostic Accuracy: Integrated LED status lights provide diagnostic fault codes to help contractors quickly pinpoint issues with the limit circuit, pressure switches, or flame sensors.
• Optimized Ignition Control: Precise microprocessor management of the 120V ignitor and 30A cool blower relay ensures efficient heating cycles and system reliability.
• Comprehensive Kit: Includes the 903106 integrated control board, mounting hardware, and standard wiring adapters for seamless field installation.

What does it mean if the diagnostic LED on my 903106 board is flashing twice?
A two-flash code typically indicates that the pressure switch is stuck open while the inducer blower is running. We recommend checking the pressure switch tubing for obstructions and ensuring the inducer motor is reaching full speed.

Is the Nordyne 903106 compatible with older M2 or M3 furnace series?
Yes, the Nordyne 903106 is the specified direct replacement for M2 and M3 series furnaces, as well as several models across the Gibson KG6RC series.

Can this board be used in a "twinning" furnace configuration?
This board is designed to support twinning applications when paired with another compatible control board, allowing two furnaces to operate on a single thermostat for higher-capacity requirements.

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.