The upper zone would not come down at all on warm afternoons. He logged both zones overnight, showed me where the curve flattened out, and the part he changed matched what the log pointed at.
Clarissa H.2026-05-22
Sheet index A-01
Sub-Zero refrigeration faults we repair in Jacksonville
One manufacturer, diagnosed properly before it is quoted. $80 flat to diagnose, credited toward the repair, and 90 days on labor, 365 days on parts.
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R-01
Sub-Zero ice maker not producing
No ice, short cubes or a harvest that never releases — and the one measurement that separates the two halves of the fault.
- No ice at all after 24 hours with the arm down
- Cubes come out hollow, short, or fused into a slab
- The mold fills but the harvest never releases
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R-02
Sub-Zero refrigerator not cooling
One compartment warm, the other cold — and why two sealed systems split the diagnosis in half.
- Fresh food section warm while the freezer still holds
- Both compartments drifting up together over several days
- The compressor runs constantly and never cycles off
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R-03
Sub-Zero condenser deck and airflow service
The maintenance job that prevents most sealed-system failures, and the local reasons it comes due sooner here.
- The compressor runs almost continuously in summer
- Warm air pouring from the grille above the door
- Both compartments a few degrees above setpoint
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R-04
Sub-Zero door seal and condensation
Water on the frame, frost in one corner, or a door that drifts open — the seal is doing less than it looks.
- Water beading on the frame or the door face
- Frost building in one upper corner of the freezer
- The door swings back open unless it is pushed
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R-05
Sub-Zero wine storage temperature drift
Stability matters more than the setpoint. What causes a zone to swing, and how we prove it over a full cycle.
- The two zones no longer hold different temperatures
- Corks pushing up, or seepage at the capsule
- Condensation forming on the inside of the glass door
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R-06
Sub-Zero control board and display faults
A dead panel is not always a dead board. The supply-side checks that come before any control is replaced.
- The display is blank but a fan or compressor still runs
- Buttons respond intermittently or not at all
- The setpoint resets itself after a power interruption
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R-07
Sub-Zero built-in installation and retrofit
The measurements that decide whether a built-in fits, taken before the cabinet is ordered rather than after.
- The rough opening is short by a fraction of an inch
- No dedicated circuit within reach of the cabinet
- Crown moulding or a soffit blocking the grille exhaust
General note 1 — scope of work
- On the ticket
- Built-in and integrated Sub-Zero refrigeration, indoors, in a kitchen or a pantry: refrigerators, freezer and refrigerator columns, undercounter cabinets, wine storage and ice machines. The sealed system, the controls, the fans and defrost, the door and its gasket, and the opening the cabinet is trimmed into.
- Not on the ticket
- Heating and air conditioning. We do not install, service or diagnose furnaces, heat pumps, air handlers, condensing units for the house, thermostats for the house, or ductwork. We are not an HVAC contractor and not a ventilation contractor, and we do not hold ourselves out as either.
- Not on the ticket either
- Any other manufacturer, and any cooking, laundry or dishwashing appliance of any make. One product line from one maker is the entire reason we are useful on it.
- The name
- Sub-Zero on this site means the appliance manufacturer — the name stamped on the built-in refrigerator in the kitchen. It is a refrigeration brand, not a heating or cooling contractor with a similar name.
What does a Sub-Zero repair cost here?
One number is known before the van moves: $80 to read the cabinet, credited against the work if you approve it. Everything scheduled beneath it is a band and not a figure, because the part sets the number and the part is not named until the readings are in.
| Item | Band |
|---|---|
| Reading the cabinet, diagnostic sequence | $80 flat |
| Door gasket or seal replacement | $230–$620 |
| Evaporator or condenser fan motor | $270–$580 |
| Defrost heater, thermostat or sensor | $240–$640 |
| Ice maker, water valve or supply line | $250–$670 |
| Electronic control board | $420–$860 |
| Compressor or sealed-system repair | $900–$2,340 |
$80 buys the readings; $2,340 is the ceiling of everything scheduled above it. The written estimate sits between the two and carries one figure, handed over before a part is ordered.
Asked and answered
Questions about the list itself
- What if my fault is not on one of these sheets?
- Call and describe it. A symptom that fits none of these sheets is still refrigeration, and we will tell you on the phone whether it is ours to take on — including when the honest answer is that it is not, which costs you nothing.
- Which of these repairs are the expensive ones?
- Only the sealed system, at $900–$2,340. Everything else on this index sits well below it: $230–$620 for a door seal, $240–$640 for a defrost part, $420–$860 for a control board. That shape is the reason the sealed system is checked last.
Not listed
If the fault is not on this sheet, call and describe it. We will tell you on the phone whether it is ours to fix. If the question underneath it is whether to fix the cabinet at all, that sum is worked through on the worth-fixing sheet.
Call +1 (904) 977-8701Customer feedback
What owners said after a repair
4.5 out of 5 across 71 customer reviews. Read every one of them.
Cubes were coming out hollow and fusing into a slab in the bin. He timed a fill, weighed what landed in the mold, and traced it to a partly blocked supply line under the floor.
Thaddeus G.2026-07-30
Cabinet was cycling far too often after our kitchen work. Plaster dust had loaded the coil completely. Cleaned, rechecked, and he said plainly it would want doing again sooner than the usual interval.
Wilhelmine J.2026-05-25