Before you request service, read this
"Fresh-food section warm while the freezer still holds" — in plain language
This is the request we see most, and it sounds alarming, but it usually is not the whole unit dying. A built-in Sub-Zero with dual refrigeration runs two separate sealed systems under one grille — one for the fresh-food side, one for the freezer. So the fresh-food section can go warm while the freezer still holds a hard 0°F. That split is actually good news: it points away from the shared compressor and toward the fresh-food evaporator fan, a frosted evaporator coil behind the rear panel, a stuck air damper, or that zone's control board or thermistor reading wrong. What confirms it on site is simple and measurable — we log both compartment temperatures against their set points, pull the rear evaporator panel to look for frost, and meter the fan and sensor before we name a part. If the freezer were warm too, the conversation would shift toward a single shared fault or sealed-system loss, which is a different and pricier path.
One limitation, stated up front: we cannot diagnose your unit from your readings and model details. The request details and photos narrow the likely cause and decide which parts should ride along — but the actual fault is confirmed with instruments in your kitchen, never assumed from a description. If anyone quotes a firm repair before reading the temperatures, be cautious.