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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
Setpoints 38°F Fresh food 5°F Ice production 0°F Freezer
Series · DEC / DET / DEU

Sub-Zero Designer series — DEC and DET

Designer is the current name for the fully integrated platform that carried the Integrated name and the IT, IC, ID and IW prefixes, and its condenser is at the bottom rather than the top.

Current series 2022 onward Reviewed

A technician crouched at the foot of an open refrigerator cabinet with a work light in one hand.
On a panel-ready cabinet the diagnosis happens before a single fixing is touched.
Series data
Designer series data
Series nameDesigner
Plate prefixDEC, DET, DEU
Former nameIntegrated
Production2022 onward
CondenserBottom-mounted
Sealed systemsTwo — one per compartment, two compressors, two evaporators
Water filter4204490 or 9030868
Service codesEC50
Representative models
  • DEC 18 in. column
  • DEC 24 in. column
  • DEC 30 in. column
  • DEC 36 in. column
Series notes and exceptions
Designer exceptions
Condenser locationBottom, behind the base grille
Former series nameIntegrated, prefixes IT, IC, ID and IW
ConfigurationColumns in 18, 24, 30 and 36 inch widths, plus over-and-under cabinets
Setpoints38°F fresh food, 0°F freezer
Water filterTwist-in 4204490 or 9030868
Failure profile

What this series actually presents with.

Cabinet running warm after a cabinetry change or a new toe-kick

Restricted airflow at the bottom grille, which is the only air path this platform has

Door not self-closing on the last part of its travel

Soft-close hinge out of adjustment or a panel heavier than the hinge was set for

Column pair where one cabinet fails and the other is untouched

Separate appliances with separate sealed systems, diagnosed and quoted separately

Frost forming in a freezer column with no obvious door problem

Defrost fault or a frozen drain rather than a seal issue

Panel standing proud at one corner

Panel weight and hinge adjustment, not a refrigeration fault

Designer is the current name for the fully integrated platform. Before the rename it was called Integrated and the plates read IT, IC, ID or IW. Designer plates read DEC, DET or DEU. Both vocabularies appear across this site because the installed base in Northeast Florida is still overwhelmingly the older one.

Integrated means flush and invisible

A Designer cabinet is designed to disappear. It takes full-overlay custom panels, sits flush with the cabinet run, and carries no visible grille at the top. That last point is the practical difference from a Classic and it drives most of what goes wrong.

The condenser is at the bottom

On Designer and legacy Integrated cabinets the condenser is at the bottom, behind the base grille. On the Classic and legacy Built-In platform it is at the top. Getting that wrong wastes a service call and, worse, leads homeowners to conclude their cabinet has no condenser to clean.

The bottom position collects different debris. Not cooking grease, which rises, but floor dust, pet hair and whatever a vacuum cleaner pushes under the cabinetry. Six to twelve month intervals, halved with pets, unnecessary under six months of age.

The bottom position is also easy to block. We see cabinets that stopped holding temperature within weeks of a kitchen refresh because a decorative toe-kick, a new floor with a thicker underlay, or a run of trim narrowed the base opening. If your Designer began struggling after cabinetry work, say so when you book; it changes the first thing we look at.

The 48°F rule applies here as everywhere: above that against a 38°F setpoint, a cleaning is unlikely to recover the compartment. And if temperatures are not back at setpoint 24 hours after a cleaning, the cabinet needs service.

Columns are separate appliances

Most Designer installations are columns: a refrigerator column beside a freezer column, sometimes with a wine cabinet in the same run. Each column has its own model plate, its own serial, its own sealed system and its own warranty clock. It is completely normal for one to need a compressor while the one beside it runs untouched for another decade.

The over-and-under Designer cabinets carry the same dual-refrigeration architecture as the built-in platform: two compressors and two evaporators, the fresh-food side cool and moist, the freezer frigid and dry. A warm refrigerator over a 0°F freezer is a single-circuit fault, not a contradiction.

Soft-close hinges and the panel

Designer doors use soft-close hinges that pull the door shut through the last part of its travel. From roughly zero to sixty degrees open, the door should close itself. New hinges are stiff and they loosen with use: the action noticeably improves over about three months.

That means two things. A brand-new installation that feels heavy is usually not faulty. And a five-year-old door that has stopped self-closing usually needs adjustment rather than a hinge, especially if the panel has been replaced with heavier stock or the handle has moved.

There is no lock on any of these doors. The seal pulls hard for a few seconds after closing because the trapped air has cooled and contracted, and it releases as the pressure equalises. Do not force a door in that window.

Water, ice and drains

Twist-in filter 4204490 or 9030868. It is a maintenance item, and the reason to change it on schedule is flow rather than taste: a saturated cartridge restricts the supply and produces thin or hollow cubes that read as a failing ice maker. Fill volume is measured before anything on the ice system is condemned, because a mold that will not release is a harvest fault — ejector, mold thermostat or mold heater — and a slab of ice at the back of the compartment is a fill tube fault. Three complaints, three different repairs.

Freezer columns on this platform freeze their drains. The blockage is ice far more often than debris. Nothing rigid goes into that tube and no boiling water goes down it, because the drain heater and evaporator pan are on the other side of it. The fix is a controlled defrost and then a diagnosis of why it froze.

Codes

If the display is showing a service code, leave it in place until the technician has seen it. Board fit is serial-dependent on this platform, so we read the plate rather than publishing board numbers.

Price bands

What does a Designer series repair cost?

Bands for the work this series is brought in for. Board fit and several sealed-system parts are serial-dependent, so the figure is fixed after the plate is read, not before.

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
Defrost heater, thermostat or sensor $260–$650
Door gasket or seal replacement $250–$630
Electronic control board $440–$790

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

Verdicts on Designer cabinets

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

A sheet of ice across the bottom basket every fortnight. He traced it to a frozen drain, defrosted the cabinet properly, and then went looking for the reason it kept freezing instead of just clearing it.

Josefina R.2026-03-05

The column ran loud enough to hear from the next room. It was the evaporator fan blade clipping a build-up of frost, and behind that a door that had never sealed properly since the kitchen was refitted.

Simone O.2026-03-03

Second opinion after another shop wanted to replace the entire column. He measured, found a seized evaporator fan and fitted one. Quicker and less costly, though I waited a while for the appointment.

Ivan S.2025-12-11

Reference

Questions we are asked

The cabinet started running warm after new trim went in. Are those connected?
Almost certainly. This platform breathes through the base grille and has no other air path, so a decorative toe-kick or a deeper trim piece across that opening raises head pressure and extends run time until the cabinet stops holding setpoint.
Is a DEC column pair one appliance or two?
Two, with two plates, two serials and two sealed systems. They are diagnosed and quoted separately, and it is entirely normal for one to need work while the other runs untouched for years beside it.
The door has stopped pulling itself closed. Is that refrigeration?
Not usually. Soft-close hinges go out of adjustment, and a panel heavier than the hinge was originally set for will do the same thing. The refrigeration symptoms that follow, frost and a compartment that will not hold, are downstream of the door rather than the cause.
Independent service company

Designer service

Quote the full model and serial number from the plate. Sub-Zero control boards are serial-dependent, so we never confirm a board number from a description alone. $80 flat diagnostic, credited toward the repair.

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

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.