Sub-Zero controls may show a service icon, wrench, EE indication, double dashes, LOC or door-related messages. The display is a starting point, not automatic proof that a specific part failed.
What to Record Before the Appointment
- Exact model and serial family
- Actual compartment temperature or complete display message
- Whether the symptom affects one zone or the full appliance
- Recent power interruption, cleaning, installation or heavy-loading event
- Photos of the display, frost pattern or visible leak when safe
Diagnostic Sequence Used in Sandy Springs
The visit follows a controlled visible condition → noninvasive readings → component isolation → written estimate sequence. For established Sandy Springs residences, custom kitchens, built-in refrigeration, professional cooking, finished floors, and appointment access requirements, dispatch notes also record seasonal occupancy and property-manager access. Local conditions such as winter temperature swings and water-line exposure are considered without assuming they caused the failure.
| Stage | Check | Decision Standard |
|---|---|---|
| 1 | complete display text and whether it flashes | Measured or documented before a component is recommended |
| 2 | model and serial family | Measured or documented before a component is recommended |
| 3 | compartment temperatures | Measured or documented before a component is recommended |
| 4 | door and drawer closure | Measured or documented before a component is recommended |
| 5 | control history and measured sensor response | Measured or documented before a component is recommended |
Why the Model Number Changes the Answer
Classic built-ins, Designer columns, undercounter units, wine storage and legacy Sub-Zero platforms do not share one wiring layout or one diagnostic table. Wolf gas, dual-fuel, electric and induction products also use different ignition and control systems. A symptom or code narrows the path; measured results identify the failed system.
Safe Next Step
Photograph the display before cycling power. If cooling is lost or a breaker trips repeatedly, protect food and leave the unit off for professional testing.
Coverage Around Sandy Springs
This page supports appointments in Buckhead, Tuxedo Park, Paces, Chastain Park, Morningside-Lenox Park. These are mobile service areas, not claims of a separate storefront in every community.