Trane SWT1711 Limit Switch

The Trane SWT1711 Limit Switch is a critical OEM safety component designed for precise thermal regulation in Trane and American Standard residential and light-commercial furnaces. This auto reset thermal limit switch features a SPST (Single-Pole Single-Throw) contact configuration, engineered to open at 200°F and automatically close at 170°F. As a "limit open on rise" control, it protects the heat exchanger by interrupting the 24V or 120V burner circuit if internal plenum temperatures exceed safety thresholds due to restricted airflow or blower failure.

Built for durability in high-cycle environments, the Trane SWT1711 utilizes quick-connect terminals for efficient field replacement. With a current rating of 5.8 FLA and 34.8 LRA at 120 VAC, it offers a reliable service life of 100,000 cycles. When diagnosing service codes such as a 4-flash red light on Trane control boards, this 170-200F furnace limit switch is the primary replacement part to ensure the system remains protected against overheating while maintaining consistent air distribution cycles. Professionals trust this genuine HVAC high limit control to maintain factory specifications and equipment safety standards.

• OEM Precision: Genuine Trane replacement ensures exact calibration for the 170°F reset and 200°F open trip points.
• Automatic Reset: Eliminates the need for manual intervention once temperatures return to the safe 170°F range.
• Enhanced Conductivity: Features pre-plated Ni-Zn terminals to prevent corrosion and ensure stable electrical connections.
• Universal Compatibility: Replaces older part numbers including SWT1711 and SWT01711 in various 80% and 90% AFUE furnace models.

• Can I bypass this switch to test the burner? While technicians may use a jumper for temporary diagnostic testing, the system must never be operated without a functional limit switch as it prevents heat exchanger damage and fire hazards.
• What causes this limit switch to trip frequently? Frequent tripping is usually a symptom of restricted airflow, often caused by a dirty air filter, blocked return vents, or a failing blower motor.
• Is this switch compatible with 120V circuits? Yes, it is rated for both low-voltage control circuits and up to 120 VAC applications.

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.