Trane SWT1190 Pressure Switch

When you are troubleshooting a low-pressure trip on a Trane condenser or air handler, you need a reliable Trane SWT1190 Pressure Switch to ensure the compressor does not run during low-charge conditions. This OEM Trane replacement part, often superseded by SWT01190, is a high-side or low-side safety control (depending on system configuration) specifically calibrated with a 155 PSI open and 275 PSI close logic. In many split systems and packaged units, it functions as a low pressure cut out to prevent oil logging or compressor overheating when refrigerant levels drop below safe thresholds.

The SWT1190 pressure control features a rugged SPST (Single Pole Single Throw) contact configuration designed for 24V control circuits. As a veteran technician knows, maintaining the R-410A pressure settings specified by the manufacturer is critical for system longevity. This switch provides the precise HVAC pressure switch calibration required to protect expensive internal components from atmospheric contamination or vacuum operation. Whether you are performing a Trane HVAC repair or a routine safety circuit inspection, this genuine switch ensures factory-spec performance and terminal compatibility.

• Precise Pressure Thresholds: Fixed settings at 155 PSI (Open) and 275 PSI (Close) provide accurate system protection.
• Direct OEM Fit: Eliminates the need for field modifications or bracket adjustments frequently required with universal HVAC safety switches.
• Heavy-Duty Construction: Built to withstand the high-vibration environment of commercial HVAC systems.
• System Protection: Actively prevents compressor failure by breaking the contactor circuit during low refrigerant events.

Is the SWT1190 compatible with the newer SWT01190 part number?
Yes, the Trane SWT01190 is the direct manufacturer replacement for the SWT1190. It maintains the exact same electrical ratings and pressure trip points for seamless integration into existing Trane control boards.

What causes this switch to trip in a standard R-410A system?
A trip at the 155 PSI open point typically indicates a leak, a restricted filter drier, or a failed expansion valve (TXV) causing the suction pressure to drop below the safe operating range.

Can I use a multimeter to test if the switch is faulty?
With the system off and pressures equalized above 275 PSI, you should measure continuity across the terminals. If the circuit remains open under these conditions, the pressure switch has likely failed and requires replacement.

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.