Wine Storage · UW-24 · 315W
Sub-Zero UW-24 and the Older 315W Undercounter Wine Units
The same hole in the cabinetry has held two quite different machines. A UW-24 is a two-zone cabinet with an electronic panel. The 315W before it is one zone and a knob. Both draw air through a kickplate you will be glad is still removable.
LA Sub-Zero Repair Pros works on these units across the Westside and the West Valley — (310) 919-2538.
Written byElena Sandoval
- Role
- Refrigeration technician — cabinet, door and seal work
- In the trade
- 24 years in the trade
- Certification
- EPA 608 certified
Telling a UW-24 from a 315W
Sub-Zero’s use and care guide for the UW-24 describes an electronic panel, two zones with separate controls preset at 45°F and 55°F, and an alarm that chimes if the cabinet falls below 32°F or climbs 15 degrees above its setting. Its racks pull three-quarters out. A 315W has none of that: one knob, one zone between 45°F and 55°F, four bottles to a roller-assembly shelf and two more on the stationary shelf, twenty-six in all.
Air at ankle height in Venice
The kickplate in an island sits a few inches off the floor and a few streets from water. Grit and salt load the fins faster there than inland. Sub-Zero asks for the condenser on a UW-24 every six to twelve months and on a 315W every three to six; near the beach, take the shorter end of whichever belongs to your unit.
What actually fails on this series
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Both halves of a UW-24 now read the same
Only the UW-24 has two zones to lose. When each control stops moving its own compartment and the pair report one figure, the barrier between them is where we look first, ahead of the refrigeration.
Quoted after the diagnosis rather than off a list: a divider between compartments is not a door, and it is not the same part.
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Thick frost has built across the evaporator
The 315W guide gives three causes, in a useful order: a gasket no longer sealing, a door held fractionally open by something inside, or a thermostat that never lets the cabinet rest. Only the last is a part.
Defrost heater, thermostat or sensor $290–$670
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The fan behind the kickplate has gone quiet
Neither cabinet is loud, so a stopped fan is noticed as wine sitting two or three degrees warm rather than as silence. Clear the grille and clean the fins first: a choked condenser reads the same and costs nothing to check.
Evaporator or condenser fan motor $310–$680
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Water is standing in the bottom of the cabinet
Two causes, and the guide keeps them apart. A drain trough hose blocked or out of position puts water inside. A drain pan overfilling sends you back to the door and gasket, letting in more warm damp air than the unit can dry.
Diagnosed before it is quoted: the hose and the door are different jobs with different parts.
Ranges are bands, not quotes. You get a firm figure for your own unit after the diagnosis and before a part is fitted, and the $89 visit comes off it.
Asked about the UW-24 · 315W
Why does a 315W have no display to read?
Because it was never given one. The 315W is a single-zone cabinet with a rotary control: turn the knob clockwise for colder and read the result on a thermometer rather than a screen. It has no SERVICE indicator either, so a 315W drifting warm has to be measured and diagnosed rather than interrogated.
How long should one of these take to pull down to temperature?
Sub-Zero allows roughly twenty-four hours on a 315W from a cold start, and says a cabinet filled with room-temperature bottles may run continuously for about that long before it settles. A full cabinet then runs less than a half-empty one. Past a day of unbroken running with nothing improving, something is wrong.