The sweat connection design ensures a leak-free

This SPST normally closed switch is engineered to monitor high-limit temperatures

offering the exact specifications required to meet Johnson Controls water valve compatibility standards and prevent downtime caused by seal failure in hydronic loops

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

For peak performance and proper gravitational flow

Nordyne 903108 Control Box 30067439-890 The sweat connection design ensuresThe 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