Trane CNT1170 Defrost Control

The Trane CNT1170 Defrost Control is a critical OEM replacement part designed for precision management of the defrost cycle in high-efficiency heat pump systems. This SPST (Single Pole Single Throw) control utilizes a 70Op 37Cl calibration, specifically engineered to open at 70°F and close at 37°F. By accurately monitoring the evaporator coil temperature, the CNT1170 prevents excessive ice accumulation that can lead to reduced airflow and potential compressor liquid slugging. Built to rigorous Trane technical specifications, this control ensures the unit maintains optimal thermal exchange rates without unnecessary energy consumption. Its robust design is a direct-fit solution for technicians looking to restore factory-standard demand defrost logic in residential and light commercial equipment. Whether you are troubleshooting a frozen heat pump coil or performing preventative maintenance, this 70-ohm resistance control provides the reliable switching required to protect the reversing valve and auxiliary heat circuits during extreme cold-weather operations.

• Engineered Calibration: Precision 70Op 37Cl (70°F Open/37°F Closed) setpoints ensure accurate cycle termination and initiation for maximum efficiency.
• OEM Compatibility: Designed as a genuine Trane replacement part, ensuring seamless integration with existing control boards and wiring harnesses.
• System Protection: Actively prevents evaporator icing and helps maintain the longitudinal integrity of the outdoor coil by managing frost buildup.
• Durable SPST Design: High-quality single pole single throw switching mechanism built to withstand frequent cycling in demanding HVACR environments.

What are the specific temperature settings for the Trane CNT1170?
This control is calibrated to open the circuit at 70°F and close it at 37°F, allowing the system to exit or enter the defrost mode based on the actual coil temperature.

Is the CNT1170 compatible with other brands?
While functionally similar to other SPST controls, the CNT1170 is a specialized Trane OEM part designed for specific heat pump models. Always verify technical specifications and mounting requirements before installation.

What are the signs of a faulty defrost control?
Common symptoms include a completely frozen outdoor coil, the outdoor fan failing to shut off during defrost, or the unit staying in defrost mode for excessive periods without melting ice.

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.