Undersized refrigerant suction line can do what?

An undersized refrigerant suction line can lead to increased pressure drop, reduced system efficiency, and potential overheating of the compressor. This can cause the system to struggle to maintain the desired cooling capacity, resulting in inadequate cooling and higher energy consumption. Additionally, it may lead to liquid refrigerant returning to the compressor, risking damage and shortening the lifespan of the system. Proper sizing of the suction line is crucial for optimal performance and reliability.