Trane THT2440 Limit Switch

Maintain peak operational safety in residential heating systems with the Trane THT2440 Limit Switch. This genuine Trane OEM replacement part is a critical safety component designed to monitor heat exchanger temperatures and prevent hazardous overheating conditions. As a high-reliability 150-180°F auto reset limit switch, it is engineered to automatically open the electrical circuit when internal plenum temperatures reach 180°F, effectively shutting down the burner to protect the secondary heat exchanger and surrounding components. Once the system cools to 150°F, the switch closes to resume standard heating cycles. Constructed with high-grade stainless steel terminals, the THT2440 ensures superior electrical conductivity and resistance to oxidation in high-duty environments. This HVAC furnace limit switch is a direct-fit solution for various Trane and American Standard furnaces, ensuring seamless compatibility and restoring factory-spec performance for demanding contractors and service technicians.

• Precise Thermal Protection: Features a calibrated 180°F open and 150°F close setpoint for accurate temperature regulation.
• OEM Standards: Guaranteed Trane THT2440 specifications ensure optimal fitment over universal aftermarket alternatives.
• Automatic Reset Logic: Eliminates the need for manual intervention by cycling automatically once safe temperatures are restored.
• Enhanced Durability: Equipped with corrosion-resistant stainless steel terminals for long-term reliability in thermal-cycling environments.
• Critical Safety Compliance: Acts as a primary fail-safe to prevent equipment damage and fire hazards in blocked-vent or low-airflow scenarios.

Is the Trane THT2440 compatible with American Standard furnaces?
Yes, because Trane and American Standard share the same engineering platforms, the THT2440 is frequently used across both brands. Always verify the part number against your specific unit’s bill of materials.

What causes a THT2440 limit switch to trip repeatedly?
Frequent tripping is typically an indicator of restricted airflow. Check for dirty air filters, blocked return air ducts, or a failing blower motor, as these issues cause the heat exchanger to exceed the 180°F safety limit.

Can I use a manual reset switch to replace this auto-reset model?
No. You must always replace an auto-reset limit switch with the exact OEM-specified reset type and temperature rating to ensure the system’s safety controls function as designed by the manufacturer.

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.