The Bosch HVAC 8733953202 Indoor Unit Main Control Board is a genuine OEM electronic control component designed for compatible Bosch BVA Series air handlers, including 2–5 ton models. It functions as the central control point, processing thermostat and sensor signals while coordinating blower operation and heating or cooling sequences.This board helps maintain reliable airflow, accura... https://www.partshnc.com/bosch-hvac-8733953202-indoor-unit-main-control-board