--- title: "Wine Cellar Cooling Unit Problems — Symptoms and What They Mean" description: "A cellar that will not hold 55°F, water under the unit, an iced evaporator, damp walls, dry corks, a unit that never stops or keeps restarting: the wine cellar…" url: "https://winecellarrepair.center/problems/" --- Start with the symptom # Wine cellar cooling unit problems, symptom first. Every symptom we are called out for, traced to the causes that actually explain it — cheapest first. Start from what you are seeing rather than from what you think is broken. ## Needs a visit now These four sit at the top because a room full of wine, or the house around it, is exposed: a cellar warming with every rack occupied, water from the unit soaking into drywall or pooling near an outlet, a scorched smell at the grille or on the exhaust side, and a unit that trips its breaker again each time it tries to start. Keep the cellar door closed while you read; a well-sealed room full of bottles holds its temperature for many hours, and every trip inside with the door propped open costs some of that. If the room passes about 70°F, or help is more than a day off, take the bottles that matter most to the coolest dark corner of the house and lay them down. Where water has reached an outlet, a power strip or the unit's cord, stay out of it; cut the power only at the breaker panel, and only while standing on a dry floor well away from the leak. [Book a visit](https://winecellarrepair.center/schedule/) The collection is exposed ### [Wine Cellar Too Warm](https://winecellarrepair.center/problems/cellar-too-warm/) A wine cellar too warm shows up slowly: the room smells of the house instead of cool stone, a bottle picked from a middle rack feels barely cooler than your hand, and the wall thermometer has crept from the mid 50s into the 60s over a week. Causes, cheapest first 1. Exhaust side too hot or boxed in *no repair* 2. Room gaining more heat than the unit can remove *varies* 3. Evaporator or condenser fan stopped *low to moderate* [All 6 causes and what to check](https://winecellarrepair.center/problems/cellar-too-warm/) The collection is exposed ### [Cellar Cooling Unit Leaking Water](https://winecellarrepair.center/problems/cellar-unit-leaking-water/) A cellar cooling unit leaking water leaves a dark stain spreading down the wall under the unit, drips landing on the top row of bottles, a wet patch on the floor of the next room, or water where a ceiling unit meets the drywall. Causes, cheapest first 1. Condensate tray or outlet clogged *low* 2. Drain line kinked, disconnected or flat *low to moderate* 3. Condensate pump stopped *low to moderate* [All 6 causes and what to check](https://winecellarrepair.center/problems/cellar-unit-leaking-water/) The collection is exposed ### [Burning Smell From a Cellar Cooling Unit](https://winecellarrepair.center/problems/cellar-unit-burning-smell/) A cellar cooling unit burning smell reaches you as hot plastic or scorched dust at the cellar door or at the exhaust grille next door, sometimes with a buzz, a flicker of the controller or the unit shutting off on its own. Causes, cheapest first 1. Fan motor overheating *low to moderate* 2. Loose or burned wiring connection *low to moderate* 3. Compressor start components overheating *moderate* [All 5 causes and what to check](https://winecellarrepair.center/problems/cellar-unit-burning-smell/) The collection is exposed ### [Cellar Cooling Unit Tripping the Breaker](https://winecellarrepair.center/problems/cellar-unit-tripping-breaker/) A cellar cooling unit tripping breaker trouble looks like a silent unit, a warm cellar in the morning, and a breaker or GFCI outlet that has snapped off, sometimes the moment the compressor tries to start. Causes, cheapest first 1. Water reaching wiring or the controller *low to moderate* 2. Compressor drawing too much at start *moderate to highest* 3. Circuit shared with other loads *no repair* [All 5 causes and what to check](https://winecellarrepair.center/problems/cellar-unit-tripping-breaker/) ## Everything else we are called out for In these cases the cellar is still sitting near its setting and the bottles are resting, so an ordinary appointment is the right pace. Each page lists what an owner can look at safely while the unit keeps the room cool. [The repairs behind them](https://winecellarrepair.center/services/) ### Cellar Cooling Unit Not Turning On A cellar cooling unit not turning on stays silent and dark: no fan, no hum from the compressor, no light on the controller, while the cellar thermometer slowly drifts upward. 5 causes ### Wine Cellar Too Cold A wine cellar too cold feels like stepping into a walk-in: the thermometer sits in the 40s, bottles come out beaded with water, and the unit keeps running long after the room should have been satisfied. 4 causes ### Wine Cellar Humidity Too Low Wine cellar humidity too low shows up on a hygrometer reading under 50 %, in capsules that feel papery, in labels curling at the edges, and after years in a faint fill line dropping in the neck of older bottles. 4 causes ### Wine Cellar Humidity Too High or Mold Wine cellar mold starts as a musty smell, then white or green fuzz on the rack posts, spotted labels and dark specks in the corners, usually with a hygrometer reading well above 70 %. 5 causes ### Cellar Cooling Evaporator Coil Icing Up A cellar cooling coil icing up shows as white frost behind the cellar-side grille, weak air from the unit, water dripping when it goes quiet, and a room that warms while the unit keeps running. 5 causes ### Cellar Cooling Unit Running Constantly A cellar cooling unit running constantly never falls quiet: the compressor hums all day and night, the exhaust side stays warm, and the cellar either barely holds its temperature or drifts slowly upward. 5 causes ### Cellar Cooling Unit Short Cycling A cellar cooling unit short cycling starts, runs for a few minutes and stops, then starts again soon after, so the room temperature bounces and the air feels cold but clammy. 5 causes ### Cellar Cooling Unit Loud or Vibrating A cellar cooling unit loud enough to notice rattles, buzzes or drones through the cellar and the next room, sometimes shaking the bottles in the nearest rack or humming through the wall studs. 5 causes ### Condensation on Wine Cellar Walls or Glass Condensation on wine cellar glass shows as a fog or beads of water on a glass wall or door, streaks running down to the frame, and in a cellar with poor walls, damp patches on the drywall or ceiling. 5 causes ### Cellar Cooling Unit Exhaust Overheating A cellar cooling unit exhaust overheating makes the room on the other side of the wall uncomfortably warm, blows hot air hard enough to feel from across the room, and often makes the unit stop and restart in the afternoon. 5 causes ### Cellar Cooling Unit Fan Not Running A cellar cooling unit fan not running leaves the cellar-side grille still and silent while the compressor hums, or leaves the exhaust side quiet and the unit hot to the touch. 4 causes ### Cellar Cooling Controller Display Blank A cellar cooling controller display blank shows nothing at all, flickers, shows half a number, or ignores its buttons, sometimes while the unit keeps cooling and sometimes while it stops. 4 causes ### Cellar Cooling Unit Error Code A cellar cooling unit error code appears as letters or digits on the controller, a flashing reading, a blinking light on the unit, or an alarm tone, sometimes while the cellar still holds its temperature. 8 causes ## Not every wine cellar cooling unit breaks the same way. A through-the-wall unit sits in an opening between the cellar and the next room and pushes its heat out the back, a ducted unit lives outside the cellar and sends cool air in through supply and return ducts, a split system hangs an evaporator in the room and puts the condenser outdoors with a line set between them, and a ceiling unit cools from above with its heat carried away overhead. Which of the four keeps your cellar? [All wine cellar cooling unit types](https://winecellarrepair.center/types/) ### Through-the-wall cellar cooling unit A self-contained box set into an opening in the cellar wall: its cold face blows into the wine room, and its warm face breathes out into the room next door. ### Ducted cellar cooling unit A self-contained cooling unit placed outside the cellar, in a mechanical room, attic or basement, that sends chilled air in and takes return air back through insulated ducts. ### Split-system cellar cooling An evaporator inside or beside the cellar and a condensing unit outside or in another room, joined by an insulated copper line set and charged on site. ### Ceiling-mounted cellar cooling A cooling unit hung in the cellar ceiling or set into the space above it, so only a grille shows, with its heat sent into the space above or ducted away. Every kind we service ### All wine cellar cooling units, side by side The archive puts the 4 types against each other: how to tell which you own, what fails on each, and which manufacturers build them. How to tell yours What fails on each Who makes them Open the type archive Familiar brands. Expert care. ## For the brands in your cellar. Independent repair service. Not affiliated with, authorized or endorsed by any manufacturer. Brand names and model numbers are the property of their respective owners and are used here for identification only, to describe the appliances we service. [All 7 brands](https://winecellarrepair.center/brands/) ## The repairs behind the symptoms Most people arrive knowing what they are seeing, not what is wrong. These are the jobs a visit usually turns out to be. [All 10 repairs](https://winecellarrepair.center/services/) diagnostic ### 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. moderate to highest ### 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. highest ### Cellar cooling leak search and recharge Finding where a cellar unit or a split system is losing its refrigerant, repairing the joint or coil, and charging it by weight rather than topping it off. low to moderate ### Cellar evaporator and condenser fan repair Restoring the two fans a cellar unit depends on: the one that moves cellar air across the cold coil and the one that throws the heat away. moderate ### 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. low ### Cellar condensate drain and pump repair Clearing and rerouting the line that carries water off the cellar coil, and repairing the condensate pump where the water has to travel uphill. low to moderate ### Cellar coil icing and defrost repair Stopping ice from forming on the cellar coil by finding what starves it, whether airflow, charge, controls or humid air coming into the room. moderate to highest ### Split-system cellar line set repair Repairing, reinsulating or rerunning the copper lines and control cable that join the cellar evaporator to its outdoor or remote condensing unit. low to moderate ### Cellar humidity control repair Bringing a wine cellar back into its humidity window, roughly 50 to 70 percent, by fixing the humidifier, the fan settings, the drain or the room. lowest ### Cellar cooling load and room check Measuring the cellar as the cooling unit sees it: insulation, vapor barrier, door, glass and the heat load, to show whether the unit can ever keep up. For the heart of your home. ## Questions about the problems. ### My cellar is doing something that is not listed. Can I still book? Yes. The pages here cover the complaints we hear most; anything else books the same way. A sentence in the notes about the sound, the smell, the reading on the controller or where the water shows up gives the technician a place to start. ### Damp walls and a warm cellar at the same time: where do I start? Start with the one you noticed first. In a cellar, moisture on the walls or behind the racks often points to a gap in the vapor barrier or a door that lets house air in, and that same leak loads the unit until the room cannot stay cool. Each page links to the problems that tend to travel with it. ### Which cellar problems need a technician today? A room climbing toward 70°F with the racks full, water from the unit running into a wall or across the floor near an outlet, a burning smell, and a breaker that will not stay on. Each problem page says how urgent it is; a noisy fan while the room holds its setting, or a little dew on a cold pipe, can wait for the booked day. ### Did the wine suffer if the cellar ran warm for a few days? A slow climb of a few degrees that comes back down rarely does lasting harm; wine minds big swings and real heat far more than a short spell above 55°F. Look for corks that have pushed up or wine weeping around the capsule, which means the bottle got warm enough to expand. Keep the door closed while the unit recovers, and open any doubtful bottles sooner rather than later. --- **[Read on the site: Wine Cellar Cooling Unit Problems — Symptoms and What They Mean](https://winecellarrepair.center/problems/)** **[Book a visit with WineCellarRepair.center](https://winecellarrepair.center/schedule/)**