Use the sensitivity adjusting screw located under the housing to modify the force required to actuate the SPDT snap switch

you maintain the boiler system performance and safety standards originally established by the manufacturer

Durable Construction: Built to withstand the constant thermal cycling typical of warehouse and industrial heating applications

Optimized Airflow: The 24-degree blade pitch is specifically calibrated to maximize heat rejection in Nordyne HVAC systems

which may require stainless steel variants

York S1-031-02970-000 Converter Kit 321894-706 Use the sensitivity adjusting screwThe York S1 031 02970 000 USB Converter Kit is a critical diagnostic interface for professional HVACR contractors and service technicians. Designed for seamless communication between high performance HVAC control systems and modern digital workstations, this OEM kit eliminates the complexity of field data retrieval. By utilizing the York S1 03102970000 serial to USB adapter, technicians gain immediate access to real time system monitoring,