heavy panel weight

Environmentally Robust: Moisture-resistant construction allows for reliable performance in high-humidity plenum environments

This board is engineered as a pin-for-pin ICM321 equivalent

Key Benefits Universal Compatibility: Serves as a primary service replacement for Robertshaw 41-603

Pre-Installed Safety: Includes a factory-mounted L200-60F limit switch to protect the system from airflow restrictions and thermal runaway

Trane CNT2237 Defrost Controller R-410A heavy panel weightThe 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