Trane CNT4875 Control Kit

The Trane CNT4875 Control Kit, now officially replaced by the Trane BAYLOAM020B, is a critical OEM evaporator defrost control designed for precise thermal management in commercial HVAC systems and packaged RTU units. This Frostat kit functions as an electronic temperature monitoring solution that actively prevents ice accumulation on the evaporator coil by cycling the compressor during low ambient cooling or low airflow conditions. Engineered for rapid response, the control initiates a diagnostic cycle when coil temperatures drop to 10°F (-12.2°C) or below and restores standard operation upon reaching a 60°F (15.6°C) reset point. As a direct HVAC replacement part, it ensures consistent airflow efficiency and protects the compressor from liquid slugging or high-pressure events caused by coil freeze-up. This kit is essential for maintaining the operational integrity of 6 to 25-ton Trane units, providing a seamless upgrade for contractors managing HVAC system troubleshooting and long-term refrigeration maintenance.

• Optimized System Efficiency: Prevents excessive frost buildup, ensuring maximum heat transfer and reduced energy consumption.
• Direct OEM Replacement: The BAYLOAM020B serves as the exact technical successor to the legacy CNT4875, ensuring pin-for-pin compatibility.
• Compressor Protection: Automatically manages compressor cycles to mitigate risks associated with low-temperature operational stress.
• Rugged Reliability: Built for industrial HVAC applications, featuring durable electronic components that withstand high-cycle environments.

Is the CNT4875 still available as a new part?
The original Trane CNT4875 has been discontinued and superseded by the BAYLOAM020B. All new orders will be fulfilled with the updated kit, which meets identical or superior technical performance standards.

How do I troubleshoot a defrost fault with this control kit?
Verify the Frostat sensor inputs and check for closed circuits during active cooling. The control utilizes an auto-reset diagnostic; if the unit is stuck in a lockout, check for restricted airflow or low refrigerant levels before cycling power.

Which Trane models are compatible with this defrost control?
This kit is standard for Trane commercial packaged units and RTUs ranging from 6 to 25 tons. Always verify your specific model number against the factory parts list to ensure correct application.

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.