Trane SWT1403 Pressure Switch

As a seasoned technician, you know that a reliable Trane SWT1403 Pressure Switch is the first line of defense against compressor slugging and evaporator freeze-ups. This genuine OEM Trane replacement part, also identified by the updated manufacturer number SWT01403, is a high-precision low pressure control switch designed for critical monitoring in residential and commercial HVAC systems. Operating with a calibrated 7/22# setpoint, this switch is engineered to open the circuit at 7 PSI and close at 22 PSI, ensuring your equipment operates within safe refrigerant pressure parameters. This Trane SWT01403 low pressure switch features a robust SPST configuration and is rated for 120/240V applications, making it a versatile drop-in replacement for a wide range of Trane and American Standard air handlers and rooftop units. With its extended 210-inch leads, this factory-spec control allows for flexible mounting and secure termination in complex control cabinets. When you are troubleshooting short-cycling or "pressure switch open" fault codes, installing this factory-calibrated HVAC low pressure cutout restores system logic to original performance standards without the need for field adjustments.

• Factory-Calibrated Precision: Fixed 7 PSI open and 22 PSI close settings provide consistent protection against low-charge conditions.
• Universal Voltage Compatibility: Engineered to handle 120V or 240V control circuits for broad system integration.
• Extended 210" Leads: Provides ample length for routing through large cabinets, eliminating the need for splicing or lead extensions.
• Direct OEM Replacement: Replaces legacy part number SWT1403 and ensures correct fitment for specific Trane RAUCD and RAUCC models.
• System Protection: Critical for preventing oil migration and ensuring the longevity of HVAC compressors in variable load environments.

How do I verify if the SWT01403 is tripped?
With the system calling for cooling, use a manometer to check suction line pressure. If the pressure is below 7 PSI, the switch should be open. Use a multimeter to check for continuity across the leads; if the system is above 22 PSI and the circuit remains open, the internal diaphragm or contacts have likely failed.

Can this switch be used for high-pressure cutouts?
No, this is a dedicated low pressure control switch. Using a 7/22# switch in a high-pressure application will prevent the system from ever starting, as it would trip immediately upon high-side pressure buildup.

Why does this switch have such long leads?
The 210-inch lead length is specific to large-format Trane air handlers and rooftop units where the control board and the pressure port are located in separate sections of the chassis.

This item is not eligible for free shipping.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.