The Trane IS20020051F5000 Air Pressure Control Switch (also known by part numbers CNT03671 and D670130P01) is a single-pole, single-throw (SPST) switch designed to detect and respond to airflow conditions in your HVAC system. It activates or deactivates components based on a precise pressure threshold of 0.20" WC, helping ensure safe and efficient operation of furnaces and air handlers. Key Features SPST air pressure switch for precise airflow monitoring Setpoint at 0.20" WC for accurate activation Designed for residential and light commercial HVAC units Compatible with gas furnaces and packaged systems Ensures proper system operation and safety Specifications Part Numbers: IS20020051F5000, CNT03671, D670130P01 Type: SPST (Single Pole, Single Throw) Setpoint: 0.20" WC Function: Air pressure monitoring and control Application: HVAC airflow verification Compatible Models YCP036F1H0AD YCP060F3M0AC YCP048F1H0AC YCP036F4H0AC YCP060F1M0AC YCC036F1M0BK YCC060FWM0BJ YCC036FWH0BJ YCC048FWH0BJ YCC048F4H0BJ (Model list shortened for clarity) Why Choose This Item With a precise pressure activation point and OEM-grade quality, the Trane IS20020051F5000 pressure switch is an essential component for maintaining safe and reliable HVAC operation. Whether replacing a failed switch or performing preventive maintenance, this part delivers consistent performance, perfect fit, and peace of mind for your system.