Equipped with multiple basic circuit protections to withstand daily voltage fluctuations, effectively protecting the circuit and compressor, and reducing the chance of failure or damage. Low-energy, energy-saving design, with operating power consumption in line with standards; replacement does not increase the overall power consumption of the refrigerator, maintaining its original energy efficiency. The circuit board has been treated for moisture and dust resistance, suitable for the humid and enclosed environment of a refrigerator, reducing common issues like moisture damage, electric leakage, and short circuits. The heat dissipation structure is reasonable; during operation, heat disperses evenly, preventing overheating and freezing, making long-term continuous operation more stable. Signal transmission is sensitive; temperature control sensing and display feedback are timely, operation responses are smooth, without lag, malfunction, or other minor issues.