Samsung-built GE refrigerator tech updates - models PFSS PFSF and others: • Main Board with Integrated Power Supply • Variable Speed Inverter Compressor • Discrete Compressor Inverter Board • Series Sealed System with 3 way Valve • New 9 Cube Icemaker with Water Flow Control Sensor • New Articulating Mullion • New Water Tank • New Ice Bucket Refer to service guide 31-9162 for the rest of the unit