![Trane SWT3939 Limit Switch, 140°F specifications — New England Supply House [NESH-SPECTABLE-V1]](http://newenglandsupplyhouse.com/cdn/shop/files/nesh-swt3939-specs.png?v=1794004674&width=1445)
The Trane SWT3939 is a thermal limit switch that monitors temperature and interrupts the circuit to protect the equipment from overheating. It opens at 140°F and closes again at 110°F. This is a genuine Trane replacement part. Confirm the part number against your equipment's parts list before ordering.
Specifications
| Part Number | SWT3939 |
|---|---|
| Brand | Trane |
| Type | Limit Switch |
| Open Temperature | 140°F |
| Close Temperature | 110°F |