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Trane SWT03739 High Pressure Switch Open 650 PSI/Close 500 PSI

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Special Price $48.85 Regular Price $63.50
Out of stock
SKU
SWT03739
The Trane SWT03739 High Pressure Switch is used to check refrigerant pressure in HVAC systems. Its main purpose is to guard the system by opening at 650 PSI and closing at 500 PSI, to ensure that it does not run under unsafe conditions of high pressure. The internal mechanism react to the changes in pressures and activates an electrical signal to the controls circuit in response to the attainment of set points. It is done by connecting the switch to the refrigerants line and wiring it into the system control.
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HVAC Controls & Electrical, Switches, Pressure Switches
Manufacturer:
https://www.partshnc.com/media/catalog/product/s/w/swt03739_1.jpg

Specifications

  • Type: High Pressure Switch
  • Pressure: 650 open PSI & 500 Close PSI
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Product Questions (2)
Customer Questions
What maintenance is required for the Trane SWT03739 High Pressure Switch?

Regularly inspect the switch for leaks, corrosion, or loose electrical connections. Clean any debris around the sensor area and ensure proper pressure calibration. Proper maintenance prevents false trips, ensures accurate system operation, and protects HVAC components.

What are common issues with the Trane SWT03739 High Pressure Switch?

  • Switch failing to activate at set pressure.
  • Frequent tripping or false triggers.
  • Corrosion or buildup affecting performance.
  • Intermittent electrical connectivity or signal issues.

Installation Steps

Step 1: Turn off power to the HVAC system at the breaker to prevent electrical shock.

Step 2: Relieve system pressure before removing the old switch to avoid injury.

Step 3: Disconnect wiring from the old pressure switch, noting terminal connections.

Step 4: Remove the old switch and clean the mounting threads.

Step 5: Install the new switch and tighten securely.

Step 6: Reconnect wiring to the correct terminals.

Step 7: Restore power and test the system for proper pressure operation.