Trane CNT3783 Limit Switch 320074-702 Field technicians know that precise

Field technicians know that precise belt geometry is essential for maintaining static pressure and airflow performance in York package units and large-scale rooftop systems

this OEM replacement part is essential for verifying proper blower operation and flue venting before the ignition sequence begins

if the controller shows an ignition lockout code but the gas valve is energized

ensure the 50 sq

Trane CNT3783 Limit Switch 320074-702 Field technicians know that preciseThe Trane CNT3783 Limit Switch is a critical safety component engineered for precise thermal management in high demand furnace and air handler applications. As an OEM Trane replacement part, this SPST (Single Pole Single Throw) device operates on a Normally Closed (N C) circuit, designed to interrupt electrical flow immediately when the system achieves its setpoint. Calibrated with a 220F opening temperature, it serves as a primary high limit defense