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Independent service company Refrigeration only: built-in and integrated columns, freezers, wine storage, undercounter units and ice makers. Mon–Fri 8am–6pm · Sat 9am–4pm · Sun closed
Cold Line Refrigeration Service · Independent Book online Call · Mon–Fri 8:00am – 6:00pm (904) 604-7755
Setpoints 38°F Fresh food 5°F Ice production 0°F Freezer
Index · Six repair types

Sub-Zero repair services, by cabinet

Refrigeration only. Sub-Zero is a kitchen appliance manufacturer and builds no ranges, no cooktops and no heating or air-conditioning equipment, so nothing on this site pretends otherwise. Every page below covers one class of cabinet and the faults it actually presents with.

An open built-in refrigerator with hand tools laid out on a folded towel on the kitchen floor beside it.
Six kinds of call, one cabinet type. The tools on the towel are the same every time.
01

Sub-Zero refrigerator repair

The fresh-food side runs its own compressor and its own evaporator, so a warm refrigerator sitting above a freezer that still holds 0°F is a specific fault with a short list of causes.

Presenting symptoms
  • Fresh food compartment warm while the freezer still holds 0°F
  • Fresh food reading above 48°F against a 38°F setpoint
  • SERVICE indicator flashing with a service code on the display
02

Freezer column repair

A freezer column holds 0°F on one sealed system with no fresh-food side to borrow air from, so frost, drain ice and defrost faults present differently here than they do in an over-under cabinet.

Presenting symptoms
  • Freezer running above 0°F while the paired refrigerator column is fine
  • Heavy frost on the rear evaporator cover or on packaged food
  • Ice sheet forming across the floor of the lower basket
03

Wine storage repair

Wine cabinets hold a narrow band far above freezing, so the failures that matter are drift, humidity and light rather than the frost and defrost problems that dominate food refrigeration.

Presenting symptoms
  • Upper and lower zones converging on the same temperature
  • A zone reading several degrees above its setpoint
  • Condensation forming on the inside of the glass door
04

Sub-Zero ice maker and ice machine repair

Ice production has a 5°F temperature floor, a fill volume and a harvest cycle, and the three of them fail in ways that look identical from the front of the cabinet and are not.

Presenting symptoms
  • Ice maker not making ice at all while the freezer still reads close to 0°F
  • Cubes coming out thin, hollow or cloudy
  • Ice maker overfilling and freezing the mold into a solid block
05

Undercounter refrigeration repair

Undercounter units live in the hottest, most airflow-restricted position in the kitchen, and most of their faults trace back to the grille, the drain or an ambient temperature the cabinet was never rated for.

Presenting symptoms
  • Cabinet running warm in summer but recovering in cooler months
  • Compressor running continuously in an island or outdoor installation
  • Water pooling on the floor of the cabinet or on the kitchen floor
06

Refrigerator drawer repair

Drawer units carry their whole seal on a moving part, so alignment, runner wear and gasket compression cause more warm-drawer calls than any refrigeration component does.

Presenting symptoms
  • One drawer holding temperature while the other runs warm
  • Drawer front standing proud of the cabinetry on one side
  • Drawer dragging, grinding or refusing to close the last inch
How a visit runs

Measured first, quoted second, ordered third.

  1. Both compartments are read against both setpoints before anything is touched.
  2. The condenser is located for that series and its restriction is assessed, not guessed.
  3. Any stored service code is recorded as found. We do not clear codes before the diagnosis is complete.
  4. The failing sealed system is identified before a single component is condemned.
  5. A written estimate is handed over. Nothing is ordered and no work starts until it is approved.

$80 flat diagnostic, credited toward the repair. Written estimate before any part is ordered or any work begins.

Genuine OEM parts. No aftermarket substitutions on sealed-system or control components.

Board fit is serial-dependent, so we do not publish control-board part numbers as definitive. The serial comes off the plate at the visit.

EPA Section 608 certified technicians — the federal requirement to open a sealed refrigeration system.

By series

Which cabinet do you have?

Price bands

What does a refrigeration repair cost here?

One book for all six repairs. Which band a job lands in is decided by the diagnostic, not by the phone call that books it.

Bands that fit this page, parts and labor
Work Typical range
Diagnostic visit, credited toward the repair $80
Compressor or sealed-system repair $900–$2,360
Ice maker, water valve or supply line $230–$630

Parts and labor together, on this equipment, in this market. The band is where the work lands before it is measured; the figure itself is written down after the diagnostic and before anything is ordered. $80 of it is the diagnostic, credited toward the repair once you approve the work, and $2,360 is the top of the range on this page rather than a price anybody expects to pay. The whole book is here.

Customer feedback

Recent work, in the owners' words

4.5 out of 5 across 90 customer reviews. Read all of them.

Salt air had eaten the fin stock at one corner of the condenser. He was straight with me that cleaning would not bring it back and quoted the coil work instead of pretending otherwise. Fair, if not what I hoped to hear.

Nathan V.2026-05-29

The diagnosis was right and the beverage cabinet is holding again. Getting the part was the problem. Three weeks, two chased phone calls, and every update came because I rang them rather than the other way round.

Dmitri K.2025-12-02

The drawer unit was warm on the left and cold on the right. He found a runner had dropped so the seal lifted at one end, reset the alignment and replaced a gasket that had taken a permanent set.

Miles F.2026-04-16

Reference

Questions about the work itself

Do you repair heating or air-conditioning equipment?
No. Not heating, not air conditioning, not heat pumps, not air handlers and not ductwork. We do not install, service, replace or quote any part of a comfort-cooling or heating system, indoors or out, and we do not subcontract one. Sub-Zero is a kitchen appliance manufacturer. The name is a brand stamped on the model plate of a built-in refrigerator, a freezer column, a wine cabinet or an undercounter unit — it is not a temperature reading and it is not a heating or cooling trade. Six kinds of repair are listed on this page and every one of them happens inside a kitchen cabinet.
Do you repair cooking appliances too?
No, and it is not modesty. Sub-Zero builds refrigeration and nothing else, so a company advertising Sub-Zero range or oven repair is telling you something about itself. Refrigeration only: built-in and integrated columns, freezers, wine storage, undercounter units and ice makers.
How does a visit actually run?
Measured first, quoted second, ordered third. Both compartments are read against both setpoints, the condenser is located for that series and assessed, any stored code is recorded as found, and the failing sealed system is named before a component is condemned. Written estimate before any part is ordered or any work begins.
What if a second fault turns up once the cabinet is open?
It is quoted separately and before it is touched. One approved estimate covers the fault it was written for, and nothing else is added to the invoice on the day without you agreeing to it first.
Independent service company

Book a diagnostic

$80 flat diagnostic, credited toward the repair. Written estimate before any part is ordered or any work begins.

Mon–Fri 8am–6pm · Sat 9am–4pm · Sun closed. Scheduled appointments only. No after-hours or emergency service.

Call (904) 604-7755 Book online Contact

40 miles by road from Fruit Cove and St. Johns County. Drive distance, not straight-line radius.

90 days labor, 365 days parts, genuine OEM components.

EPA Section 608 certified technicians — the federal requirement to open a sealed refrigeration system.