Written by Jim Hopper, Wine Cooling Expert · Updated September 2026
Finding the Correct Part Starts With Your Model and Serial Number
To find the right replacement part for a wine cellar cooling unit, start with the brand, model and serial number on the unit's label, then match the symptom to the component that causes it. Confirm the exact part with the manufacturer or an authorized dealer before you order, because parts are specific to the series and model.
This guide covers Breezaire, WhisperKOOL and Wine Guardian: what each part does, how to match it to your unit, what the warranties say, and which repairs belong with a licensed technician.
In short: identify the unit, then the symptom, then the part. Controllers, sensors, fans and accessories such as grilles, duct collars and drip pads are common owner or installer replacements. Compressors, coils, driers and anything in the refrigerant circuit are technician work. Wine Guardian parts have a shipping cost. Breezaire and WhisperKOOL parts ship free within the contiguous United States.
What Each Wine Cooling Unit Part Does
Every wine cellar cooling unit, whatever the brand, is built from the same families of parts. Knowing what each one does tells you which part a symptom points to.
Common replacement parts, their job and typical symptoms
| Part | What it does | Typical symptom when it fails |
|---|---|---|
| Compressor | Pumps refrigerant and drives the cooling cycle | Unit runs but does not cool, will not start |
| Condenser and evaporator coils | Release heat outside and absorb heat inside the cellar | Poor cooling, frost, overheating when dirty or blocked |
| Fans and blowers | Move air across the coils | Noise, weak airflow, a fan that does not spin |
| Controller or thermostat | Holds the set temperature and shows alarm codes | Blank display, wrong readings, unit will not respond |
| Sensors and bottle probes | Measure the temperature the controller acts on | Inaccurate readings or a sensor alarm code |
| Relays and transformers | Start the compressor and supply low voltage to the controls | Clicking, no start, no power to the display |
| Filter drier and sight glass | Keep the refrigerant circuit clean and show refrigerant flow | Reduced cooling (technician diagnosis only) |
| Grilles | Protect the condenser side of a through-the-wall unit | Blocked or damaged grille, overheating |
| Duct collars and ducting kits | Connect a ducted unit or an exhaust to its ductwork | Poor airflow, air leaks at connections |
| Wall sleeves | Support and mount a through-the-wall unit in the wall opening | Needed for a new or replacement installation |
| Remote interface and remote sensor | Control the unit and read temperature and humidity from inside the cellar | Communication alarms, readings that do not match the room |
| Humidifier drip pads | Hold water for an evaporative humidifier | Water no longer stays on the pad, mineral build-up |
If you are still diagnosing the problem, start with our wine cellar cooling troubleshooting guide or look up a display code in the error codes guide for wine cooling units.
How to Match a Replacement Part to Your Unit
- Read the unit label. Note the brand, model and serial number. Wine Guardian calls this the serial plate; keep your purchase records too.
- Name the series. For example Breezaire WKL, WKCE or WKSL; WhisperKOOL SC PRO, Extreme or Platinum Split; Wine Guardian through-the-wall, ducted or split.
- Record the symptom. Write down any display code, noise, frost or water, and take a photo of the display.
- Check the manual. The owner's manual or installation instructions list the codes and accessories for your model.
- Confirm before you order. Share the model, serial number and symptom with the manufacturer or an authorized dealer so the exact part can be confirmed.
Replacement Parts by Brand: Breezaire, WhisperKOOL and Wine Guardian
Each brand's parts range reflects how its units are built. The table shows what our catalog carries for each brand today.
What we carry for each brand
| Brand | Parts in our catalog | Shipping |
|---|---|---|
| Breezaire | Compressors, condenser and evaporator coils, fan assemblies, evaporator blower, Sentry III controller, bottle probes, starting and low voltage relays, transformer, filter drier, sight glass, condenser grills | Ships free within the contiguous United States. |
| WhisperKOOL | Exterior grills and condenser ducting kits for SC PRO and Extreme units, evaporator ducting kits, airflow kits, UV lighting systems, exterior enclosures, condenser coil coating, 24V thermostat conversion kit | Ships free within the contiguous United States. |
| Wine Guardian | Duct collars and collar kits, flexible ductwork, round and oval duct connections, through-the-wall wall sleeves, remote interface controller, remote sensor, communication cable, humidifier drip pads | Shipping cost applies. |
Why ducting parts come from the manufacturer
WhisperKOOL's SC Series manual describes its ducting kit as a way to duct the exhaust side of the unit to an area where the extra heat will not matter, and states that using any other ducting system voids the warranty. Wine Guardian sells ducting for its ducted units in kits by size, each with two adapter collars, a length of flexible duct and two straps.
For through-the-wall Wine Guardian Sentinel and Defender units, the EasyMount installation sleeve supports the weight of the unit and must be mounted level and fastened to the wall studs.
Warranty Rules and Serial Numbers by Brand
Replacing a part yourself can affect coverage. Check the rule for your brand first; these points come from each manufacturer's published warranty documents.
Warranty points that affect part replacement
| Brand | Coverage summary | What to do before a repair |
|---|---|---|
| Breezaire | WKL and WKCE: parts five years, factory labor one year from original retail purchase. WKSL: components one year. | Contact your dealer. Alteration or repair by anyone other than Breezaire voids the warranty, and the serial number must be verifiable. |
| WhisperKOOL | SC Series: two-year limited warranty plus a five-year compressor limited warranty. Split systems: the installing HVAC/R technician must complete the warranty checklist to activate coverage. | Contact WhisperKOOL Customer Service before attempting service on a unit under warranty. An altered or removed serial number voids the warranty. |
| Wine Guardian | Standard warranty: 25 months parts, 13 months labor. | Get authorization from a Wine Guardian representative before labor charges. Warranty correspondence needs the model and serial number, and a defaced serial number voids the warranty. |
When to Call the Manufacturer or a Licensed Technician
Usually owner or installer work: grilles, duct collars and ducting, wall sleeves at installation, remote sensors and interface controllers, bottle probes and humidifier drip pads, following the manual for your model.
Technician work: compressors, coils, filter driers, sight glasses and anything that opens the refrigerant circuit, plus electrical diagnosis of relays, capacitors and control boards. Wine Guardian's manuals state that only qualified personnel should perform maintenance, and Breezaire recommends a licensed refrigeration technician for WKSL split systems.
Call the manufacturer or dealer first whenever the unit is under warranty, or when the same alarm returns after a repair.
Wine Cooling Expert, Wine Cellar Authority
The most expensive part is the wrong one. Send the model, serial number and a photo of the display before you order, and let us confirm the part against the manufacturer's listing. It takes a few minutes and saves a return.
What a Technician Replacement Involves
These service videos are made for qualified technicians and installers. They show what a component replacement involves, so you can judge whether a repair is a job for you or a professional.
Replacing a Wine Guardian fan motor
A step-by-step service tutorial showing access, removal, installation and a final operation check.
- Intended for qualified technicians
- Access, remove, install, test
- Wine Guardian cooling systems
Accessing compressor start components
How a technician safely reaches the compressor start components on a Wine Guardian unit for diagnostics and service.
- Electrical diagnostics
- Preventative maintenance access
- For HVAC professionals
Popular Replacement Parts From All Three Brands
A few of the parts owners ask for most. Browse the Breezaire replacement parts collection, the WhisperKOOL grills, ducting and accessories and the Wine Guardian duct collars, sensors and accessories for the full ranges.
Brand Guides in This Series
Breezaire parts and repair
Common Breezaire parts, Sentry III codes and ordering: our Breezaire replacement parts and repair guide.
OEM or universal?
When a genuine part is required and what a universal part risks: Breezaire OEM vs universal parts.
Prevent the next failure
Coil cleaning and the rest of the routine: the Breezaire maintenance guide.
Real questions owners ask before they order a part for a wine cellar cooling unit. Tap any question to expand the answer.
How do I find the right replacement part for my wine cooling unit?
Note the brand, model and serial number from the unit's label, name the series, and write down the symptom or display code. Then confirm the exact part with the manufacturer or an authorized dealer before you order, because parts are specific to the series and model.
Where is the model and serial number on a wine cellar cooling unit?
They are printed on the unit's label, which Wine Guardian calls the serial plate, and they also appear in your purchase records. The label position varies by model, so check the owner's manual if you cannot find it.
Can I use universal parts in a wine cellar cooling unit?
It is risky. Breezaire's warranty is voided by alteration or repair by anyone other than Breezaire, and WhisperKOOL states that using any ducting system other than its own voids the warranty. Use genuine parts, especially while the unit is under warranty.
Does replacing a part myself void the warranty?
It can. Breezaire voids the warranty for repair by anyone other than Breezaire, WhisperKOOL requires a call to its Customer Service before service on a covered unit, and Wine Guardian requires authorization before labor. Contact the manufacturer or your dealer first.
Who should replace a compressor or refrigerant parts?
A licensed HVAC or refrigeration technician. Compressors, coils, filter driers and anything that opens the refrigerant circuit need specialized tools and training, and Wine Guardian states that only qualified personnel should perform maintenance.
Is shipping free on Wine Guardian parts?
No. Wine Guardian units and parts have a shipping cost. Breezaire and WhisperKOOL units and parts ship free within the contiguous United States.
What does a WhisperKOOL condenser ducting kit do?
WhisperKOOL describes its ducting kit as a way to duct the exhaust side of the unit to an area where the extra heat will not matter, usually the exterior of the home. Using any other ducting system voids the WhisperKOOL warranty.
When should I replace a Wine Guardian humidifier drip pad?
Wine Guardian says to replace the pad when water no longer stays on it or mineral build-up starts to reduce airflow. How often depends on your water and how clean the cellar air is, and the yearly maintenance list includes replacing the drip pad.
Not Sure Which Part Fits Your Unit?
Send us the brand, model, serial number and symptom, and our team will help you confirm the right part before you order.
This guidance is general. Refrigerant, compressor and electrical work should be done by a licensed HVAC or refrigeration professional following the manufacturer documentation for your unit. Warranty summaries are taken from each manufacturer's published documents; the manufacturer has the final word on coverage.
