The BI-42S is one of Sub-Zero’s classic 42″ side-by-side built-ins, a 16.3 cu. ft. dual-compressor cabinet that’s been out of production for years — most of these units in service today are well into their second decade. Because the fresh-food and freezer sides run on separate compressors, a problem on one side rarely means the […]

The 648PRO is Sub-Zero’s legacy 48″ PRO-style side-by-side, the model the current PRO4850 replaced. It runs on a dual refrigeration system that cools the fresh-food and freezer sides separately, and its commercial-look cabinet is usually installed exposed rather than built into surrounding cabinetry — that installation style is worth keeping in mind before any repair […]

The PRO4850 is the 48″ flagship of Sub-Zero’s current PRO lineup, a 30.4 cu. ft. dual-refrigeration side-by-side also offered with a glass door as the PRO4850G. It’s built for the same exposed, commercial-kitchen look as the smaller PRO3650, just with more capacity. Because this model is current, the failure pattern is well documented: excessive compressor […]