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Seen from the exhaust room beside a wine cellar, a hand holding a phone up to the side of a through-the-wall cooling unit set high in the wall while a flashlight picks out a blank plate with no characters on its metal housing.

Troubleshooting

Find the cooling unit model plate before the visit

A wine cellar cooling unit model number is printed on a plate on the unit's housing, not on the controller. On a through-the-wall unit, check the sides visible from the exhaust room; a split system usually carries two plates, one on the evaporator and one on the outdoor condenser. Photograph the whole plate, and keep the original manual or invoice as a backup.

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(844) 398-5977

Mon–Sat, 8am–8pm

  • Checks an owner can make in the cellar
  • 4-minute read
  • Across every type and make

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Three short steps, about a minute.

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At a
glance.

The wine cellar cooling unit model number and serial number decide which manual, which parts and which refrigerant apply. On most cellar units they are on a plate fixed to the housing, often on a side hidden by the wall, the ceiling or the cabinet of an outdoor condenser.

Read the whole guide

Where CellarPro puts itLeft side of the housing

Its seven-digit serial number, which the manual asks owners to copy onto its first page.

What a split system carriesUsually two plates

One on the evaporator in the cellar, one on the condensing unit.

What makers ask for firstModel and serial number

WhisperKool lists them ahead of installation details and photos of the cellar.

Weight of a typical through-the-wall unit45 to 101 pounds

Breezaire's WKL series; a reason never to pull one out just to read a plate.

Why the plate matters more than the brand

Cellar cooling makers build several generations under similar names, and one series can include units with different compressors, controllers and cabinet sizes. WhisperKool's SC series alone spans four capacities in two housings. A fan motor or a probe that fits one may not fit the next, and the only dependable way to tell them apart is the model and serial number stamped on the housing.

The plate also records the electrical rating the unit was built for. WhisperKool's split system manual asks installers to make sure the supplied voltage matches the rating on the unit's specification plate, and a technician checks those same figures before testing a compressor or ordering a part.

  • Model number: the series and the capacity.
  • Serial number: on many makes it also encodes the build date or revision.
  • Voltage, running amps and the circuit the unit needs.
  • On most plates, the refrigerant type and charge, which matter for any sealed-system work.

Source: WhisperKool — SC Pro series owner's manual — The SC series covers the 2000, 3000, 4000 and 8000 in two cabinet sizes; support asks first for the model and serial number, then installation details and photos; the manual ends with a form for model and serial number; WhisperKool — Platinum split 4000–8000 owner's manual — Ensure the voltage supplied matches the rating specified on the unit's specification plate

Where to look on each kind of unit

Start with the paperwork, then the housing. The plate is rarely on the controller or behind the cellar-side grille, and it is never worth removing a panel to find.

Through-the-wall units

The cellar side shows only a grille, so look at the side panels from the exhaust room with a flashlight and a phone held flat to the wall. CellarPro puts its serial number on the left side of the housing. If trim is fitted tightly around the unit, the plate may be visible only through a gap between housing and framing; photograph it through the gap rather than pulling the unit, which is heavy and sealed into the wall. Breezaire's WKL units alone weigh from 45 to 101 pounds.

Ducted units

A ducted self-contained unit usually sits in a closet, a basement or above a ceiling, with ducts running to the cellar. Its plate is on the cabinet, often at the end where the power connects. In a ceiling space, take the photo from a ladder with the unit switched off at its breaker, and do not stand on joists or ductwork to reach it.

Split systems and ceiling-mounted units

A split system has two pieces and usually two plates. Outside or in a mechanical room, the condenser cabinet carries one, often near the electrical box; the evaporator in the cellar carries its own, typically on a side of the housing or behind its access cover. A ceiling-mounted unit's plate may face the ceiling itself, so check the manual or the installer's invoice before climbing up to look.

Close on a blank metal plate with no characters riveted to the side of a cellar cooling unit housing.
Close on a blank metal plate with no characters riveted to the side of a cellar cooling unit housing.

When the plate is missing or unreadable

Plates fade in humid exhaust rooms and disappear under paint when trim is refinished. Look for the owner's manual first. CellarPro asks owners to write the serial number on an early page, Breezaire's WKL instructions carry blank fields for the model, serial number, installer and date on the first page, and WhisperKool's manual ends with a form asking for the same numbers. Many installers also recorded them on the invoice or the start-up sheet left in the cellar.

If none of that survives, photograph the controller, both grilles, the drain port and the exhaust side, and measure the housing. A technician can often narrow the model from those details, though parts for a unit with no plate take longer to confirm.

  • The owner's manual: the first pages and the back.
  • The installer's invoice or start-up sheet.
  • The builder's or cellar designer's handover documents.
  • The confirmation email, if the unit was registered online.

Source: CellarPro — 1800 series owner's manual — The seven-digit serial number is on the left side of the cooling unit; the manual asks owners to write it in the space provided; WhisperKool — SC Pro series owner's manual — The SC series covers the 2000, 3000, 4000 and 8000 in two cabinet sizes; support asks first for the model and serial number, then installation details and photos; the manual ends with a form for model and serial number; Breezaire — WKL Series installation instructions — WKL units weigh 45 to 101 lb; the first page has fields for model, serial number, installer and date

Photographing it so it can be read

Hold the phone square to the plate, turn off the flash if the metal is shiny and light it with a flashlight held at an angle instead. Take one close shot that fills the frame and one wider shot that shows where the plate sits on the unit. Zoom in on the photo before putting the ladder away; a blurred digit costs more time than the climb.

Send the photos with your booking, along with the controller reading and any code, and say from which side of the wall or ceiling the unit is reached. That one message decides whether the technician arrives with the right parts and the right ladder.

Step
by step.

Five steps, in the order worth doing them.

01

Check the paperwork

The manual, the invoice and the start-up sheet often carry the model and serial number already.

02

Switch the power off

Pull the plug or turn off the circuit before reaching toward an exhaust grille, a ceiling unit or an outdoor condenser.

03

Look on the housing

The side panels from the exhaust room, the cabinet end of a ducted unit, both cabinets of a split system.

04

Photograph it twice

A close shot that fills the frame and a wider one that shows where the plate sits.

05

Send it with the readings

Attach the photos to the booking together with any code on the controller.

A couple lifting a bottle from a lit stone-walled wine cellar, the cooling unit's grille high on the far wall
For the heart of your home.

Questions
owners ask.

Is the number on the controller the model number?
Rarely. A controller often carries its own part number, which identifies the controller rather than the cooling unit around it. The number that identifies the unit is on the housing.
Do I need both plates on a split system?
Yes, if both can be reached safely. The evaporator and the condensing unit are matched by the maker, and a repair on one side usually depends on the other. If only one is reachable, send that plate and a photo of the other cabinet.
The plate faces the wall. What now?
Try the paperwork first, then a phone camera or an inspection mirror through any gap at the trim. If neither works, book anyway with photos of the unit and its controller; the plate can be read during the visit.
Does the serial number tell me the age of the unit?
On many makes it does, although each maker codes it differently. Send the full number rather than guessing; the age affects which parts are still made and weighs heavily when deciding between repair and replacement.

The problems
behind it.

Each has a page of its own: what it usually means and the causes in the order worth checking.

All 17 problems
The small controller panel on the cellar side of a through-the-wall cooling unit, its display glowing with abstract amber segments beside the slotted supply grille, the top row of a wooden wine rack with unlabeled bottles just below. Problem

Cellar Cooling Unit Error Code

8 causes, cheapest first

 A wall-mounted digital controller for a cellar cooling unit on a wood-paneled wine cellar wall, its small screen completely dark, a ceiling supply grille above and rows of unlabeled bottles in wooden racks to the side. Problem

Cellar Cooling Unit Not Turning On

5 causes, cheapest first

 A small stone-walled wine cellar with dark wooden racks full of unlabeled bottles lying on their sides, a through-the-wall cooling unit grille set high on the far wall and a round dial thermometer standing in a glass of water on a tasting shelf in front. The collection is exposed

Wine Cellar Too Warm

6 causes, cheapest first

When it needs
a technician.

The repairs on the right are where this guide ends when the checks do not settle it.

Wine cellar cooling diagnostic visit

A visit that reads the cellar, the room the heat goes to and the cooling unit itself, and ends with one named cause, whether it is a part or the room.

Cellar controller and sensor repair

Getting the controller, its display and its probes to read the cellar truthfully and call for cooling at the right time.

Cellar compressor and sealed system repair

Getting the heart of the cellar unit pumping again, from the start capacitor, relay and contactor that give out first to a compressor or a sealed-system restriction.

More in
troubleshooting.

What an owner can safely check on a cellar cooling system, from a thermometer and hygrometer among the racks to the controller's set point, the filter, the drain outlet and the exhaust side, and where to stop and book.

The whole section
Checks an owner can make in the cellar

Cellar cooling checks before booking: twenty minutes on both sides of the wall

A thermometer in a water-filled bottle, both grilles, the breaker, the door seal and the drain outlet: the checks that settle many calls before anyone drives over.

 Checks an owner can make in the cellar

Reading the cellar controller: set point, probes, modes and alarms

What the number on the display measures, why it can differ from the bottles, and how the symbols on common controllers separate a routine mode from an alarm that needs attention.

 Guides

All 18 guides

Six sections, by what you are trying to find out.

Back to your everyday

Read it and still not sure?

Book with what you checked and the model number, and the technician starts where the guide stopped.

Schedule a repair Call (844) 398-5977
(844) 398-5977 Schedule a repair