Why Is My Refrigerator Not Cooling?
A refrigerator that has stopped holding temperature is the call we treat most urgently, because food is on the line. The good news is that on premium built-in units, a warm section is more often a defrost, fan, or control fault than a failed compressor. This affects built-in, integrated, and column refrigerators, and while the exact fix depends on the brand and model, the underlying causes are consistent.
Common Causes
- A frost-blocked evaporator from a failed defrost heater or sensor
- An evaporator or condenser fan motor that has stopped
- Compressor start components that have failed
- A dirty condenser choking airflow
- A door gasket letting warm, humid air in
- On dual-refrigeration units, one sealed system failing while the other runs
Notes by Brand
The same problem shows up a little differently across the brands we service. Here is what we typically find on each:
| Brand | What We Typically Find |
|---|---|
| Sub-Zero | On built-ins, a warm fresh-food section with a cold freezer almost always points to the defrost system rather than the sealed system. |
| Wolf | Wolf does not build standalone refrigeration, but a Wolf range near a warm fridge is unrelated; we diagnose each appliance on its own. |
| Sub-Zero / True Residential / Liebherr | Column refrigeration warming with an alarm usually points to a sensor, evaporator fan, or door-seal issue. |
| Thermador / Monogram | GE-built and BSH column units may display a fault; the code narrows it to a relay, sensor, or fan. |
| Bosch / Miele | Counter-depth and integrated units warming often trace to the evaporator fan or a sealed-system fault. |
Symptom Guide
| Symptom | Likely Cause | Where We See It |
|---|---|---|
| Warm fresh food, cold freezer | Defrost heater, sensor, or evaporator fan | Refrigeration built-ins and columns |
| Both sections warm | Compressor start relay or sealed system | All refrigeration |
| Warming with a temperature alarm | Sensor, fan, or door seal | Liebherr, True Residential columns |
| Runs constantly, never cold enough | Dirty condenser or refrigerant leak | All refrigeration |
Protect Your Food First
If the unit is fully warm, move perishables to a working refrigerator or cooler and book an appointment visit. Do not keep opening the door to check, which only adds heat. A warm fresh-food section with a cold freezer is usually a defrost fault and worth a prompt call before it worsens.
How We Fix It
Our technician confirms the cause on site rather than guessing, gives you a written estimate before any work, and completes the repair with model-specific genuine OEM parts. Diagnostic and travel fees, if applicable, are confirmed before the appointment and before repair approval.
Book a Diagnosis
Detailed model and symptom intake across Flatiron and the Flatiron service area. Diagnostic and travel fees, if applicable, are confirmed before the appointment and before repair approval.
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