The Trane IS20428-6006 (also listed as SWT03221 or C342634P35) is an OEM air pressure switch engineered for 1.4" water column activation and rated at 28 VA pilot duty. This pressure switch ensures reliable monitoring and control of airflow within your HVAC system, activating or deactivating equipment as needed for safe operation. It's a genuine Trane component designed for seamless integration and performance across a variety of furnace models. Key Features OEM Replacement for precision and durability Rated at 28 VA for pilot duty operations 1.4" Water Column setpoint for airflow control Supports furnace safety and system reliability Ensures proper airflow detection and system shutdown in unsafe conditions Specifications Part Numbers: IS20428-6006, SWT03221, C342634P35 Function: Air Pressure Switch Activation Pressure: 1.4" WC Rating: 28 VA pilot duty Application: Monitors and ensures correct airflow in HVAC systems Compatible Models (Sample list ? not exhaustive) AUC1D100A9601AC AUC1B040A9241AB AUC1D120A9601AE AUC1B060A9361AE AUC1C100A9481AD AUC1B080A9421AG TDC1B080A9421AB TDC1D120A9601AB TDC1B060A9361AB TDC1C100A9481AB Why Choose This Item Opt for the Trane IS20428-6006 pressure switch to maintain system safety and efficiency. With precise activation at 1.4? WC and a pilot duty rating, it?s a reliable choice for restoring or maintaining your HVAC system?s airflow control. Choose OEM quality for the peace of mind and exact compatibility your equipment demands.