Trane CNT8121 Control Board 318820-201 an inverse mode module or

an inverse mode module or external logic inversion via the DPDT contacts is required

The 46K12 is a Counter-Clockwise (CCW) rotation blade when viewed from the discharge side (the side the air is blowing toward)

This refrigerant diagnostic tool is essential for maintaining system longevity and optimal heat transfer efficiency

Enhanced System Efficiency: Reduces compressor runtime by maximizing the use of outdoor air during favorable conditions

Trane CNT8121 Control Board 318820-201 an inverse mode module orThe Trane CNT8121 Control Board is a high performance integrated furnace control designed for precise management of heating cycles and blower motor operations. This single stage IFC serves as a direct replacement for various Trane furnace control boards, ensuring seamless integration with existing 24V thermostat wiring and 120V gas valve circuits. As a critical component for maintaining system reliability, the CNT8121 monitors safety limit switches