Carte mère de l'unité intérieure De Dietrich 770189500

The main board indoor unit is the central control circuit board for an indoor heating or cooling unit. It manages all electronic functions, including temperature regulation, fan speed, and communication with other system parts. This board is critical for the operation of split systems, heat pumps, or similar equipment. As a boiler spare part, it is a common replacement when electronic failures occur. Ensure compatibility with your specific indoor unit model. This main board helps restore intelligent control and efficient performance to your heating system.