Trane SWT1718 Pressure Switch

The Trane SWT1718 Pressure Switch is an essential OEM safety component designed for precise monitoring of refrigeration circuit pressures in Trane and American Standard HVAC systems. This low pressure cutout switch features a single pole single throw (SPST) contact configuration, factory-calibrated to open at 7 PSI and close at 22 PSI. Constructed with a direct mount design and 0.25-inch female flare (FFL) terminals, it ensures a secure, leak-free connection. With an IP65 rating for dust and moisture resistance and a thermal operating range from -7°F to 185°F, this switch is built to survive harsh mechanical environments. As a critical HVAC safety switch, it prevents compressor damage by breaking the electrical circuit if system pressure drops below the 7 PSI threshold, effectively mitigating risks associated with refrigerant loss or restricted flow. This genuine replacement pressure switch maintains the exact tolerances required for high-performance commercial and residential units.

• Precise Pressure Control: Engineered with dedicated 7 PSI open and 22 PSI close setpoints to prevent vacuum-related compressor failure.
• Durable Construction: Features an IP65-rated housing that protects internal electrical contacts from moisture, debris, and corrosion.
• Seamless Compatibility: Direct OEM replacement for Trane SWT01718 and specific American Standard models, ensuring exact fitment without field modification.
• Enhanced Safety: Heavy-duty SPST contacts provide reliable circuit interruption during critical low-pressure events to protect the refrigeration cycle.

What are the symptoms of a failing Trane SWT1718 pressure switch?
Technicians typically encounter nuisance lockouts or short-cycling. If the switch remains open despite pressures above 22 PSI, it often indicates internal scale buildup or contact fatigue, necessitating a direct OEM replacement.

Can I adjust the setpoints on this low pressure switch?
No. The Trane SWT1718 is factory-sealed and calibrated. Attempting to modify the internal spring tension or bypass the 7/22 PSI logic can lead to severe compressor damage and system instability.

Is special care needed during installation?
Yes. When replacing high-pressure or low-pressure switches near discharge lines, always use a wet cloth to protect the switch body from excessive heat during brazing, keeping temperatures below 300°F to prevent housing warping.

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.