Trane CNT1015 Limit Switch

The Trane CNT1015 is a high-reliability OEM replacement auto limit switch engineered for precision thermal management in residential and light commercial HVAC systems. This fixed-temperature furnace limit control is factory-calibrated to open at 135°F and automatically reset when the air temperature drops to 105°F, providing critical overheat protection for heat exchangers and downstream components. As a genuine Trane replacement part, it ensures direct compatibility with American Standard and Trane furnaces, heat pumps, and air handlers, maintaining the original engineering specifications for system safety and airflow regulation. This SPST thermal switch features a durable bimetal construction designed for high-cycle longevity in demanding heating cycles. For veteran contractors, the Trane CNT1015 limit switch offers a drop-in fit, reducing field diagnostics and ensuring the furnace operates within its designed static pressure and temperature rise parameters. Trust this factory-authorized component to restore safety circuit integrity and prevent nuisance tripping in high-temperature environments.

• Factory-Calibrated Precision: Fixed 105-135°F range ensures the system reacts exactly as designed to prevent boundary-limit overheating.
• Automatic Reset Function: Eliminates manual intervention by restoring the safety circuit once the unit cools to 105°F, maintaining consistent comfort.
• Direct OEM Compatibility: Specifically engineered for Trane and American Standard platforms, guaranteeing proper mounting and terminal alignment.
• Enhanced Equipment Safety: Safeguards the heat exchanger against excessive thermal stress, preventing premature failure of professional-grade equipment.

What causes a Trane CNT1015 to trip frequently?
Frequent tripping usually indicates restricted airflow, often due to a dirty filter, blocked secondary heat exchanger, or an undersized duct system causing the furnace to exceed the 135°F limit.

Is the CNT1015 a manual or automatic reset switch?
The CNT1015 is an automatic reset switch, meaning it will close the electrical circuit once the blower cools the internal temperature back down to 105°F.

Can I use an aftermarket limit switch instead of the CNT1015?
While universal switches exist, using the genuine Trane CNT1015 limit switch ensures the exact mounting depth and temperature response required for your specific furnace model's safety certification.

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.