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the 8554-019BX is the direct replacement for the legacy 8554-019
High-Capacity Performance: Optimized for large-scale boilers over 5
and maintaining head pressure within design limits
reducing the risk of nuisance trips while maintaining strict adherence to manufacturer firing rates and airflow requirements
Trane SWT1258 Limit Switch 323055-751 the 8554-019BX is the directThe Trane SWT1258 Limit Switch is a critical safety component designed for precise thermal regulation in Trane and American Standard furnaces. This automatic reset limit switch features a 3 inch insertion depth, ensuring accurate sensing within the heat exchanger airflow. It is engineered with a normally closed (NC) contact configuration, set to open at 170F and reset at 140F. As a genuine OEM replacement part, the SWT1258 provides a 1: 1 fit for