My IW-24 is not cooling at all. What should I do first?

Check the breaker, then look at whether anything new is pressed against the base of the unit or stacked in front of it. If power is on, the base is clear and both zones are still warm, stop there and call Sub-Zero Repair Woodinville on (425) 321-3414; move the most valuable bottles somewhere cool meanwhile.

How do I tell an IW-24 from an IW-18 or IW-30?

All three stand 84 inches tall behind custom panels, so height tells you nothing. Measure the cabinet width without the panel: 24 inches for this one, 18 or 30 for its siblings. The tag on the handle-side wall under the controls settles it, and it is worth a photo before you ring anyone.

Models · Wine column

Sub-Zero IW-24 Wine Column

The 24-inch member of Sub-Zero's legacy Designer wine columns: full height, panel-ready, made between 2015 and 2021.

Signed: Bjorn Aaltonen
Bench: wine storage and dual zones
Years at it: 15
Holds: EPA 608 certified
Checked: September 2026

Black-and-white view into the machine compartment of a wine cabinet, a meter probe on a wiring connector with the compressor behind — Machine compartment of a wine unit, connector on the meter

At a glance

Line: Legacy Designer, once called Integrated
Made: 2015–2021
Size: 24 in wide, 84 in tall, 24 in deep without its panel
Front: Glass door framed by a custom panel and handle; Sub-Zero sold a solid door separately
Setting range: 39°F to 65°F in the top zone and in the bottom zone
The tag: Handle-side wall, right under the controls

Checked against Sub-Zero Designer refrigeration design guide (2021) · Sub-Zero wine storage model timeline · Sub-Zero wine storage temperature range · Sub-Zero serial tag locations

What it is doing, and what that means

01Not cooling: one zone, or the whole cabinet?

If only one zone is off, a warm case or a long opening explains it, and it is creeping back toward its settingSafe to wait
Give it the day. Keep a small gap behind the bottles so the cold can move down the back of that zone.
If one zone is still off after a day with the door shut and nothing crowding the back of the racksCall (425) 321-3414
Either that zone is not getting its share of cold or its sensor is reporting the wrong figure. A meter separates the two.
If both zones are warm together, whether the cabinet has gone quiet or never seems to stop runningCall (425) 321-3414
Everything slipping at once is beyond what an owner can check from the front. Ring today rather than tomorrow.

02The display shows the setting, but a thermometer disagrees?

If the thermometer sat by the door or was read just after the door had been openSafe to wait
Put it in the middle of a rack, close the door, and read it again after several hours.
If a thermometer left mid-rack overnight still reads well away from the displayCall (425) 321-3414
The number on the panel is only what the sensor tells the control. When a fair test says otherwise, the sensor is tested first.

Built into joinery, so look at the joinery

A panel-ready column is hemmed in by cabinetry. When an IW-24 stops cooling soon after a remodel, new trim, a toe-kick board or a floor finish crowding the unit is the first thing to rule out, and you can do that before we arrive.

What a visit covers

We read both zones against a meter, check the door seal and the airflow, and tell you which price line the fault sits on before anything is replaced. The visit is $89, credited once you go ahead with the repair.

Wait or call: the IW-24

What it is doing	Check first	Safe to wait if	Call if
Both zones warm after kitchen work	New trim, a toe-kick board, a rug or stored boxes now crowding the base	Both zones recover within a day of clearing it	Nothing blocks it and both zones stay warm
Door will not pull itself shut	A rack left out, or a bottle neck in the way	It seals once the racks are pushed fully in	It swings open or stops short with the racks home
Frost or ice on the back wall	Whether the door was left ajar	It was a one-off after an open door and melts away	It builds again with the door closed
Breaker keeps tripping	Other appliances sharing that circuit	It held after one reset	It trips again, or the unit is warm after the reset

Sub-Zero Repair Woodinville · (425) 321-3414 · phone staffed 24/7 · wine and undercounter calls 8:00 am – 8:00 pm, seven days

The price line to read first

Zone sensor, thermostat or defrost heater $290–$670

On an $89 visit that comes off the repair once you approve it. The full breakdown: Wine Cooler Sensor Repair Cost.

Booked as

Wine Cooler Repair

Zone-by-zone temperature correction, compressor and door-seal work on Sub-Zero wine storage — the repair Woodinville cellars ask for most.

All models we repair

If it is doing something else

Each page forks on what that unit is most often brought to us for, so the answer to a different symptom may sit next door: the Sub-Zero IW-30, the Sub-Zero IW-18 and the Sub-Zero IW-30R. All of them price on the same cost page.

Asked about the IW-24

My IW-24 is not cooling at all. What should I do first?: Check the breaker, then look at whether anything new is pressed against the base of the unit or stacked in front of it. If power is on, the base is clear and both zones are still warm, stop there and call Sub-Zero Repair Woodinville on (425) 321-3414; move the most valuable bottles somewhere cool meanwhile.
How do I tell an IW-24 from an IW-18 or IW-30?: All three stand 84 inches tall behind custom panels, so height tells you nothing. Measure the cabinet width without the panel: 24 inches for this one, 18 or 30 for its siblings. The tag on the handle-side wall under the controls settles it, and it is worth a photo before you ring anyone.

A IW-24 doing something on this page? Tell us which fork you ended on.

(425) 321-3414 Book online

Cellar calls 8:00 am – 8:00 pm, seven days · (425) 321-3414 answered 24/7