Trane CNT8121 Control Board 318820-201 which protects internal components from

which protects internal components from heat damage during installation

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

and SGO models

For field diagnostics

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

Trane CNT8121 Control Board 318820-201 which protects internal components fromThe 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