![Trane SWT4009 Pressure Switch, 0.40 in. WC specifications — New England Supply House [NESH-SPECTABLE-V1]](http://newenglandsupplyhouse.com/cdn/shop/files/nesh-swt4009-specs.png?v=1794015646&width=1445)
This Trane SWT4009 pressure switch activates at 0.40 in. WC to confirm draft or airflow before allowing the furnace to fire safely. It is a genuine Trane replacement part. Confirm the part number against your equipment's parts list before ordering.
Specifications
| Part Number | SWT4009 |
|---|---|
| Brand | Trane |
| Type | Pressure Switch |
| Pressure Rating | 0.40 in. WC |