The Trane CNT03603 Pressure Switch (also listed as 81416944) is a SPDT air pressure switch designed to activate at a negative pressure of -0.07" WC. It is crucial in ensuring safe operation within HVAC systems by monitoring air flow and pressure differentials, particularly in gas heating and packaged systems. This OEM switch helps prevent unsafe furnace operation by acting as a safeguard against low or improper airflow conditions. Key Features OEM Trane replacement for accurate fit and function SPDT (Single Pole Double Throw) configuration for flexible wiring -0.07" WC activation pressure ensures precise system monitoring Designed for reliable operation in demanding HVAC environments Helps maintain system safety and compliance Specifications Part Number: CNT03603 Alternate Part Number: 81416944 Type: Air Pressure Switch Switch Type: SPDT Activation Pressure: -0.07" WC Voltage Rating: Low-voltage applications Mounting: Standard HVAC bracket Compatible Models YHC067E3RLA0SP0C1A1A7000H0000C YHD150G3RLD15H0D1A1A700AH00000 YHD210G3RLB0VP0C0A1A700AE00000 YHC120F3RHA0RH0C1A2A000000000E YHD240G3RLD15P1C1A1A700AE00000 YHC092F3RLA0NH0C1A1A7B0AHA000D THCSERIES / YHCSERIES / YHDSERIES / THDSERIES RAUJC30EBD13ABDF0001 RAUJC40EPF03A0DF00C1 (Full list available upon request) Why Choose This Item The Trane CNT03603 is engineered for precision and safety, making it a trusted choice for HVAC professionals servicing Trane systems. Its compatibility with a wide range of rooftop and packaged units ensures it's a reliable, go-to component for maintaining airflow safety controls. With dependable SPDT functionality and OEM build quality, this switch is essential for minimizing service interruptions and extending system life.