The Frigidaire 5304502778 Refrigerator Main Power Board regulates the voltage and controls the flow of current to various parts to ensure proper functioning. It helps in controlling the temperature, defrosting, and compressor operations, which improves energy use and stability. In addition, it has a feature of integration that ensures that it offers a steady cooling system to maintain the freshness of foods. This power board is an essential element in the proper functioning of the refrigerator, and it should not be damaged or fail to function properly.