Aprilaire 4592 Airflow Proving Switch 320735-701 the 3C1A22 provides a critical

the 3C1A22 provides a critical interface for low-water cut-offs and pump control systems

its heavy-walled copper construction and high-pressure rating make it compatible with modern refrigerants

ensuring accurate thermal response over years of service

this is a fixed-wattage element

Aprilaire 4592 Airflow Proving Switch 320735-701 the 3C1A22 provides a criticalThe Aprilaire 4592 Airflow Proving Switch is a genuine OEM airflow safety switch engineered to provide precision monitoring of pressure differentials within your HVAC system. This Aprilaire model 4592 serves as a critical differential pressure switch, ensuring that secondary equipment like whole home humidifiers or electronic air cleaners only activate when proper blower operation is detected. By acting as an HVAC airflow sensor, it prevents equipment