Part 17122000019549 is an OEM Main Control Board Subassembly used across multiple Midea, Blueridge, Ventus, Ramsond, Celiera, Cooper & Hunter, mr cool and compatible multi‑zone indoor HVAC units. This board serves as the system’s central logic module, managing temperature regulation, sensor inputs, compressor communication, and overall operational sequencing.

Designed for reliability and precise control, this subassembly ensures stable performance, accurate diagnostics, and proper coordination between the indoor unit’s electronic components. It is commonly installed in multi‑zone ductless systems, including models such as IVMH091A / IVMH091B (220V), and is frequently listed as the correct replacement for units requiring updated or failed main board assemblies.