Trane SWT1612 is an automatic limit switch featuring a 3-inch insert with a temperature range of 160°F to 190°F, designed to protect HVAC systems from excessive heat. The switch functions by monitoring temperature and interrupting the electrical circuit when the upper limit is reached, then automatically resetting once temperatures return to safe levels. It is commonly used in Trane f... https://www.partshnc.com/160-190f-autolimitsw-3insert-6