The compressor is responsible for compressing and transferring refrigerant gas. The A/C system is split into two sides, a high pressure side and a low pressure side; defined as discharge and suction. Since the compressor is basically a pump, it must have an intake side and a discharge side. The intake, or suction side, draws in refrigerant gas from the outlet of the evaporator. Once the refrigerant is drawn into the suction side of the compressor, it is compressed and sent to the condenser, where it can then transfer the heat that is absorbed from the inside of the vehicle. Compressors are designed to compress refrigerant gas only. Liquids cannot be compressed. Introduction of any liquid into a compressor can do serious damage to the delicate valves inside. This is referred to as liquid slugging.