Every full-size Sub-Zero keeps fresh food and frozen food on two separate sealed systems, each with its own compressor. When one side drifts warm, frosts up or never stops running, the cause can usually be pinned to a specific part and tested.
In the order we see them across Houston homes.
A full-size Sub-Zero, whether a Classic side-by-side, an over-and-under, a French door or a PRO 48, works around the clock, so a small problem rarely stays small for long. When a unit starts running longer or one side loses a few degrees, the cause usually comes from a short list: a thermistor reading wrong, an evaporator fan that has slowed, a control board, or the sealed system itself.
We begin with readings from both compartments and a look at condenser airflow, then test parts one at a time before recommending anything. Our vans carry the thermistors, fan motors and control boards most often needed on Classic and current PRO units, so many repairs wrap up in one visit. You get a written price before work starts, and the repair carries our 30-day workmanship warranty.
Trained on Sub-Zero refrigerator controls and diagnostics.
Genuine OEM parts, stocked for the most common repairs.
A written price, approved by you before any work starts.
A 30-day workmanship warranty on every repair.
Each side has its own sealed system, compressor and sensors, so one can keep working while the other struggles. We test the warm side's fan, thermistor and sealed system on their own instead of assuming the whole refrigerator has failed.
Both. Compressor, condenser and refrigerant-charge work counts as sealed-system repair, which federal rules reserve for EPA-certified technicians, and the people we send on refrigeration calls hold that certification.
If the warm side has climbed above a safe temperature, yes; a cooler with ice protects it during the visit. Food in a failing refrigerator stays safe for only a few hours, which is why we try for a same-day slot when one is open.
Book in about a minute, or call the desk. Same-day windows inside the Loop on most days, next-day across the rest of Houston.
