The Trane IS20257-5957 Pressure Switch (also known by part numbers CNT04320 and X1320031701) is a precision pressure switch with bracket designed to monitor and control airflow within HVAC systems. Set at 0.15" WC PR, this switch plays a crucial role in maintaining safe and efficient operation by detecting pressure changes and signaling the system accordingly. Key Features Preset pressure rating of 0.15" WC for accurate performance Includes mounting bracket for easy installation Designed specifically for Trane commercial rooftop units Helps ensure safe and reliable airflow monitoring Manufactured to Trane OEM standards for durability and compatibility Specifications Part Numbers: IS20257-5957, CNT04320, X1320031701 Function: Air pressure sensing Setpoint: 0.15" Water Column Pressure (WC PR) Mounting: Bracket included Switch Type: SPST or equivalent (typical for airflow detection) Compatible Models YCD330B4MP9B2E9B0BC0E0GHJB00K0 TCH330B30BHZAAAJ TCH330BK0BGAAAAJ TCH330BK0BHBADDJ Why Choose This Item Trust the Trane IS20257-5957 Pressure Switch to keep your HVAC system running at peak safety and performance. With a precise 0.15" WC rating, OEM design, and reliable bracket mount, it ensures accurate airflow monitoring?crucial for efficient HVAC operation and system protection in demanding commercial environments.