requiring a technician to identify the cause of overheating before restarting the system

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

this L150F-30F switch features a fixed 150°F open temperature and a 30°F differential

As a veteran-grade replacement actuator

Standardized Specs: Uses 208-230V single-phase power

Aprilaire 4924 Cutout Switch 321702-401 requiring a technician to identifyThe 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,