First: confirm there is a problem

Do not trust the display. Put an independent thermometer on a middle shelf and leave it a full day. Displays report the sensor’s location, which is not the whole cabinet, and a surprising number of “not cooling” complaints are a cabinet holding temperature perfectly well while its display reads oddly.

Also give it time. A cabinet cooling down from room temperature, or one that has just been loaded with warm bottles, takes many hours — sometimes a full day. Judge it after 24 hours, not after two.

And check the setting is achievable. A thermoelectric cabinet asked for 42°F will never get there: those floor at around 46°F by design. That is not a fault, it is the specification (temperature settings).

The five checks, in order

1. Ambient temperature

The most common cause by a wide margin. Every unit has a rated ambient range, and outside it performance falls apart.

For a thermoelectric cabinet this is often the entire answer: it cools relative to the room, so as the room warms its achievable minimum rises, and above roughly 77°F ambient it generally cannot hold a setting at all. A thermoelectric unit in a warm kitchen in August is behaving exactly as designed and still failing to do the job.

Measure the room, not the cabinet. Then compare against the manual. If the room is out of range, the cabinet is not broken — it is in the wrong place, and the fix is either a different room or a compressor unit (garage installations).

2. Ventilation

Second most common, and the most damaging if left. A cabinet that cannot reject its heat cannot reach its setting, and it will run continuously trying.

  • Is the rear or side clearance the manual specifies actually there?
  • Is a front vent blocked by a plinth, a kickboard or a cabinet panel?
  • Is a freestanding unit sitting in an enclosed cabinet opening? This is the classic case, and it is a guaranteed failure — built-in vs freestanding explains the mechanism.
  • Is the condenser coated in dust, where you can see it?

A telltale: the cabinet never audibly stops. In a stable room, a unit that never cycles off is not satisfying its thermostat, and ventilation is the first suspect (clearances).

3. Door seal

Close the door on a sheet of paper and pull. If it slides out with no resistance, the gasket is not sealing at that point. Work around the whole door.

Common causes: a gasket deformed from shipping (often recoverable — warm it gently with a hairdryer and reseat it), a cabinet not level so the door does not sit square, a shelf or bottle fouling the door, or perished gasket on an older unit. Gaskets are usually a replaceable part.

4. The wrong cooling type for the job

Not a fault but a mismatch, and worth naming plainly: a thermoelectric cabinet in a warm room, a garage, a conservatory or beside an oven is being asked to do something it cannot do. No amount of diagnosis fixes that (compressor vs thermoelectric).

5. Load and use

  • Freshly loaded with room-temperature bottles? Expect many hours, and a reading well above target meanwhile. This is the cabinet working.
  • Opened frequently? Each opening exchanges cold air for room air.
  • Nearly empty? Less thermal mass means bigger swings after each opening.
  • Interior light left on? It is a heat source inside the cabinet.

Brand-specific notes

The same five checks apply to every brand — the physics does not change with the badge. A few things are worth knowing per maker, all of which point back to the list above.

Kalamera

Predominantly compressor cabinets rated for built-in or freestanding use. Because they are often installed in cabinetry, ventilation and the front vent path are the first checks. Confirm the specific model’s installation rating before assuming enclosure is safe.

NewAir

A range spanning both cooling types, which is exactly why check 4 matters here: identify whether your unit is compressor or thermoelectric before diagnosing anything. A thermoelectric NewAir in a warm room is the single most common “not cooling” scenario in the brand.

Whynter

Both types too, and several models are built-in rated with published ranges (40–65°F for the compressor cabinets, 46–66°F for the WC-201TD thermoelectric). Check your setting against your model’s published floor before concluding it will not cool.

NutriChef and Antarctic Star

Largely thermoelectric, freestanding, in smaller capacities. Checks 1 and 4 resolve most complaints: these are the cabinets most often bought for a room that is too warm for them, and they need genuine clearance at the back rather than being pushed against a wall.

Bosch and Smeg

Integrated and built-in appliances where the installation is usually joinery. Front vent path through the plinth is the first check, followed by door alignment — a heavy integrated door on a cabinet that is not level will not seal evenly. Follow the manufacturer’s installation manual over any general advice.

Across all of them: if your cabinet is under warranty and the five checks come back clean, that is the point to call the manufacturer rather than to open anything.

When it is genuinely broken

If the room is in range, ventilation is clear, the door seals, the cooling type suits the job and the load is settled — and an independent thermometer still says the cabinet is not reaching its setting after a full day — then it is a fault. Likely candidates are a failed thermoelectric module, a failed fan, a refrigerant leak or a dead thermostat. The first two are sometimes serviceable; a refrigerant leak on a domestic wine fridge generally is not economic to repair.

If it is out of warranty and not economic to fix, the replacement decision is genuinely an opportunity to correct the original mistake: most cabinets that die early died of installation. Choose by installation type in undercounter cabinets or by cooling type in compressor cabinets, and see how long wine fridges last for what to expect from the next one.