Exceeding this limit may damage the sensing element or affect calibration accuracy

providing the reliability required by professional contractors for long-term system maintenance and critical performance standards

The sweat connection design ensures a leak-free

High Pressure Rating: Supports system pressures up to 300 PSI

Nordyne 903108 Control Box 30067439-890 Exceeding this limit may damageThe Nordyne 903108 Control Box is a critical integrated ignition control module designed for M1 series furnaces and select gas fired heating units. As a direct OEM replacement part, this Nordyne furnace control board manages the hot surface igniter (HSI), monitors flame rectification through the sensing circuit, and sequences the inducer motor and blower timings. This board is engineered to resolve common furnace ignition failures and intermittent