Trane SWT2979 Pressure Switch 321894-709 It is designed to close

It is designed to close the circuit automatically once the sensed temperature falls below the reset differential

it ensures seamless compatibility when servicing older equipment

making it an essential component for powering sensitive controllers

Robust Sensing Element: The capillary temperature sensor handles element temperatures up to 230°F

Simplified Installation: OEM-spec wiring and mounting configuration reduce field labor and ensure historical performance standards

Trane SWT2979 Pressure Switch 321894-709 It is designed to closeThe Trane SWT2979 Pressure Switch is a critical safety component designed for precise draft monitoring in high efficiency Trane and American Standard furnaces. As a OEM dual pressure switch, this part is the direct replacement for legacy part numbers BA20149 and C342634P62. This 2 stage air pressure switch features a dual diaphragm configuration engineered to sense specific vacuum thresholds: the high side is rated to open at 1. 93" W. C. and close at