Trane SWT4049 Pressure Switch 321702-401 Thermal Security: Integrated thermal overload

Thermal Security: Integrated thermal overload protection prevents burnout during high-torque or restricted airflow conditions

if the circuit remains open despite pressure being above 250 PSI

To ensure maximum job-site versatility

so we recommend verifying your system's model and serial number before installation

The oversized 3-1/8 inch non-flutter gauges provide high-contrast scales for superior legibility and precision compared to standard small-orifice gauges

Trane SWT4049 Pressure Switch 321702-401 Thermal Security: Integrated thermal overloadThe Trane SWT4049 High Pressure Switch is a critical safety component designed for precise refrigerant circuit monitoring in residential and light commercial HVAC systems. As a genuine OEM Trane replacement part, this pressure actuated switch is engineered to protect the compressor from catastrophic failure by interrupting the electrical circuit when discharge pressure exceeds safe operating parameters. Utilizing a factory calibrated set point, the