Measuring 7-1/4"W x 5-1/2"H

Common Contractor Questions: How to troubleshoot a pressure switch stuck open

Direct OEM Fit: Simplifies the electrode replacement process with precise mounting dimensions for Fenwal-equipped systems

High Voltage Threshold: Rated for 440V

It features a broad 100 to 240 degree temperature range with a sensing element consisting of a liquid-filled immersion bulb that delivers rapid response to thermal changes

Trane CNT2237 Defrost Controller R-410A Measuring 7-1/4"W x 5-1/2"HThe 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