Abstract: An apparatus and method for making and harvesting ice. Gaseous refrigerant is directed from a suction accumulator to a compressor, then to a condenser wherein the gaseous refrigerant is condensed into a liquid and through an expansion valve which reduces the pressure of the liquid refrigerant, which is then directed into the ice making plates to evaporate the refrigerant to cool the plates while water from a water supply circuit is flowed over a cold outer surface of the ice making plates allowing ice to form. During a harvest cycle, gaseous refrigerant from the compressor is directed into the ice making plates to be condensed into a liquid in the ice making plates, warming the plates to release the ice. Liquid refrigerant from the plates is directed to harvest gas generation plate and water is flowed over an outer surface of the gas generation plate, warming the refrigerant to a gaseous state, while cooling the water in preparation for the next ice making cycle.