Built-in refrigeration is the appliance where expertise matters most. A Sub-Zero column runs two independent sealed systems so the fresh-food and freezer sides can be controlled separately, and it uses microprocessor defrost logic and magnetic gaskets that a general repair tech rarely troubleshoots. When a built-in loses temperature, the food inside can represent thousands of dollars, so a fast, correct diagnosis is the whole job. Qualified professionals are assigned for the required refrigerant credential to work on sealed systems.
What We Fix
- Refrigerators that will not cool or hold temperature
- Sealed-system faults: compressor, evaporator, refrigerant
- Condenser fans and condensers choked with dust
- Evaporator fan motors and airflow problems
- Defrost heaters, sensors, and control faults
- Frost and ice buildup inside the cabinet
- Door gaskets, hinges, and seal problems
- Control boards, displays, and temperature alarms
- Water and ice dispenser issues on applicable models
Common Problems We See
The most urgent calls are a unit that has stopped cooling and one that runs constantly without getting cold. Frost building up inside, warm spots on one side of a dual-system column, and a compressor that short-cycles are also frequent. In the valley's many second homes, a slow refrigerant leak often does its damage quietly while the house sits empty, then presents as a warm cabinet the moment the owners return.
Typical Causes
A refrigerator that runs but will not cool most often has a condenser packed with dust, a failed evaporator or condenser fan, or a sealed-system issue such as low refrigerant or a restricted line. Frost buildup means the defrost cycle is not completing, which points to the defrost heater, sensor, or control. Warm spots on a dual-system Sub-Zero indicate that one of the two sealed systems has weakened. Because these faults overlap in their symptoms, we test the whole cooling path, read the control's diagnostics, and identify the real cause before we quote.
Brands We Service
We repair refrigeration from Sub-Zero, Thermador, Viking, Liebherr, True Residential, Monogram, Jenn-Air, and Miele.
Refrigerator Error and Fault Reference
| Symptom | Likely Cause | What We Do |
|---|---|---|
| Runs but will not cool | Choked condenser, failed fan, or sealed-system leak | Test cooling path, clean or replace, repair sealed system |
| Frost buildup inside | Defrost heater or sensor failure | Test defrost circuit, replace failed part |
| One side warm (dual system) | Weak sealed system on that side | Diagnose the affected system, repair |
| Runs constantly | Dirty condenser or airflow blockage | Clean condenser, verify fans and door seal |
| Temperature alarm | Sensor drift or control fault | Read diagnostics, replace sensor or board |
Fridge Warming Up Fast?
Refrigeration failures get priority. Book now and we will protect what is inside. Diagnostic and travel fees, if applicable, are confirmed before the appointment and before repair approval.
Frequently Asked Questions
My Sub-Zero Is Running Constantly but Not Cold, Why?
Do You Repair the Sealed System on a Built-In Refrigerator?
Why Is My Refrigerator Frosting Over Inside?
Related Repairs and Guides
Sub-Zero Repair
Dedicated Sub-Zero refrigeration service.
Not Cooling
Diagnose a refrigerator that stays warm.
Frost Buildup
Why frost forms and how we clear it.