Trane SWT0842 Temp Switch

The Trane SWT0842 is a field-proven SPST temperature switch designed for critical thermal regulation in residential and commercial HVAC systems. This fixed-setting limit switch is engineered to break the electrical circuit when ambient or surface temperatures drop to the 25°F opening point and reset by closing the circuit once the temperature rises to the 60°F closing point. This specific 25Op 60Cl profile is often utilized in low-temperature cutout applications or freeze protection logic to prevent evaporator icing or compressor damage during low-load conditions.

As a genuine Trane OEM replacement part, the SWT0842 ensures seamless electrical compatibility with existing control boards and wiring harnesses, operating reliably within 120/240 VAC circuits. Its single-pole single-throw configuration provides a clean, snap-action response, minimizing arcing and extending the service life of the HVAC control switch. For technicians servicing TWE series air handlers or similar Trane/American Standard equipment, this temperature limit control is the specified component for maintaining system safety and operational efficiency.

• Precise Thermal Calibration: Factory-set 25°F open and 60°F close points eliminate the need for field adjustments and ensure consistent system protection.
• Direct OEM Fitment: Designed for immediate integration into Trane and American Standard units, matching original equipment specifications for mounting and lead connections.
• Industrial-Grade Reliability: Built to withstand the high-cycle demands of HVACR environments, providing durable performance in temperature-sensitive applications.
• Versatile Voltage Rating: Rated for use in both 120V and 240V control circuits, offering flexibility for various equipment platforms.

What is the function of the 25°F open setting?
In most refrigeration and air conditioning circuits, this opens the circuit to stop operation when it detects a frost-critical temperature, protecting the system from freezing.

Can this switch be used in 24V control circuits?
While rated for 120/240V, many technicians use these in 24V pilot duty circuits; however, always verify the amperage draw against the switch’s contact rating in your specific wiring diagram.

Is the SWT0842 a manual or automatic reset switch?
This is an automatic reset switch; it will restore the circuit once the temperature reaches the 60°F rise threshold without requiring technician intervention.

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.