the sensor may be fouled or failed

provides a consistent and stable flame required for the main burner ignition sequence

A specific number of flashes indicates whether the system is in a lockout

making it a staple for contractors maintaining legacy pneumatic infrastructure

While this kit fits many C9 and H9 series units

Trane MOD2127 Module 322056-301 the sensor may be fouledThe Trane MOD2127 is a specialized ECM motor controller designed for precise variable speed blower management in high efficiency Trane and American Standard HVAC systems. This ECM engine module functions as the critical interface between the systems integrated furnace control (IFC) and the motor, regulating airflow profiles to maintain static pressure and system equilibrium. Engineered for high efficiency air handlers and gas furnaces, the MOD2127