Sub-Zero freezer repair in Sunnyvale

Most often it is a defrost-circuit fault, a failing evaporator fan that stops moving cold air, a dirty condenser losing heat rejection, or a worn door seal letting warm air in. We test the defrost heater, sensor and fan first, then check pressures. A sealed-system fault is confirmed only with pressure and electrical evidence, never guessed.

A defrost heater, sensor, fan or door gasket typically runs a few hundred dollars, while sealed-system or compressor work costs more because of refrigerant and longer labor. You get a written quote before any parts go in. The $89 service call is waived when you book the repair, and all labor carries our 365-day warranty.

Heavy frost usually means the defrost cycle is not clearing ice as designed. We check the defrost heater and sensor, look for a blocked or frozen drain line, and inspect the door gasket for gaps that pull in humid air. Fixing the actual root cause matters, because replacing only the visible ice lets the buildup return within weeks.

Yes. We service built-in freezer columns, classic over-and-under freezers and lower freezer drawers, all with genuine OEM Sub-Zero parts and factory-spec diagnostics. Drawer units often have warm or alarming compartments from a failed evaporator fan or defrost part, while columns more often involve airflow or sealed-system issues. We work carefully around surrounding cabinetry and panels during every freezer repair.

We reserve same-day and next-day windows for Sunnyvale plus Mountain View, Cupertino, Santa Clara and Los Altos. Same-day slots fill quickly, so calling early gives the best chance of a visit today. A freezer that is rapidly warming is worth flagging on the call so we can prioritize it. Reach us at (669) 338-4601.

Yes. On Sub-Zero dual-refrigeration models the freezer and refrigerator run independent systems, so a warm fridge with a cold freezer is usually a separate airflow, defrost or sensor issue on the fresh-food side. We diagnose both compartments in a single visit and quote each fix. See Sub-Zero not cooling for related symptoms.

No. We are an independent appliance repair company specializing in Sub-Zero, and not affiliated with the manufacturer. That said, we use genuine OEM Sub-Zero parts and follow manufacturer-recommended procedures and factory-spec diagnostics. Customers value our same-week scheduling, transparent written quotes and 365-day labor warranty, reflected in our 1071 reviews at 4.9 stars.