Trane SWT3157 Low Pressure Switch SPST 25 PSI Open 45 PSI Close

Description

Trane SWT3157 Low Pressure Switch

The Trane SWT3157 is a Single Pole, Single Throw (SPST) low pressure switch engineered to protect refrigerant circuits in Trane HVAC systems. With a precisely calibrated open setpoint of 25 PSI and a close setpoint of 45 PSI, this switch monitors system pressure and interrupts the circuit when pressure drops below the safe operating threshold — helping prevent compressor damage and ensuring reliable system performance.

Key Features

• SPST (Single Pole, Single Throw) switching configuration
• Opens at 25 PSI to protect against low-pressure conditions
• Closes at 45 PSI to resume normal circuit operation
• Designed as a direct OEM replacement for compatible Trane equipment
• Provides reliable refrigerant circuit protection
• Helps prevent compressor damage caused by low refrigerant pressure

Application

The SWT3157 is designed for use in Trane residential and light commercial HVAC systems where low-side refrigerant pressure monitoring is required. It is an OEM-quality replacement part that ensures proper fit and function within the original equipment design.

Specifications

• SKU: SWT3157
• Switch Type: Low Pressure Switch
• Configuration: SPST (Single Pole, Single Throw)
• Open Setpoint: 25 PSI
• Close Setpoint: 45 PSI
• Brand: Trane