Trane CNT2237 Defrost Controller R-410A Certified Compliance: Meets NSF/ANSI 372

Certified Compliance: Meets NSF/ANSI 372 lead-free requirements for potable water safety

This shaded pole motor is built for durability in continuous-duty cycles

Optimized Drainage: Features a 3/4-inch threaded outlet and a pre-sloped interior to prevent standing water and bacterial buildup

ensuring a perfect fit and matched inducer motor response

Direct Bore Fit: Standard 1/2" shaft hole simplifies the installation process for rapid field service

Trane CNT2237 Defrost Controller R-410A Certified Compliance: Meets NSF/ANSI 372The Trane CNT2237 Defrost Controller is a high precision OEM electronic board engineered for demand based defrost management in specialized Trane heat pump systems. As a veteran grade HVAC replacement part, this 24V AC controller replaces legacy boards by utilizing advanced adaptive control logic to monitor evaporator coil temperatures. Unlike standard time and temperature units, the CNT2237 uses localized sensor data to initiate the defrost cycle