As a direct replacement for OEM part number 998-0510-51

It features an adjustable pressure differential of 2 to 5 PSI

Industrial Grade Construction: Features silver electrical contacts to prevent pitting and ensure long-term draft inducer switch reliability

As a veteran-grade replacement actuator

the Watts R75-02C features integral mounting slots within the body

Aprilaire 4924 Cutout Switch 321702-401 As a direct replacement forThe Aprilaire 4924 Cutout Switch is a critical thermal safety component designed specifically for Aprilaire 1730A dehumidifiers and related high capacity models. This genuine L175 15F Cutout Switch acts as a precision engineered high temperature cutoff, monitoring internal system heat to prevent mechanical failure. When ambient or internal temperatures exceed safe operating limits, the switch automatically disconnects power to the electrical system,