The intake holes must face directly into the airflow

and Delay on Make/Break modes using an onboard DIP switch and potentiometer

it ensures a secure fit and direct compatibility with a wide range of Carrier

triggering the immediate mechanical closure of the damper blades to prevent flame and smoke migration through the ductwork

or visible vibration during the heating cycle usually indicate a bent or out-of-balance blade

Modine 3H0352600000 Electrode Assy. 30067439-890 The intake holes must faceThe Modine 3H0352600000 is an OEM Direct Spark Electrode Assy. engineered for precision ignition in heavy duty gas fired heating systems. This component is the primary 3H35260 replacement, serving as the critical interface between the direct spark ignition (DSI) module and the burner assembly. As a veteran grade Modine unit heater part, it is designed to withstand high thermal cycles while maintaining a consistent spark gap for reliable combustion. In