--- title: "Wine Cellar Cooling Unit Error Codes — What They Mean" description: "Wine cellar cooling unit codes and alarms explained: which are a setting or a display mode, which point at a high or low room reading, humidity, a probe, coil…" url: "https://winecellarrepair.center/error-codes/" --- Error codes # Wine cellar cooling unit error codes, read properly. A code narrows the search and is also the thing most often read wrong: the same characters mean different things on different brands, and a fair number of the codes people look up are not failures at all — they are modes the appliance was left in. ## Find your code, make by make. Type the characters exactly as the display shows them, or pick the make. Each code has a page of its own: what it means on that brand, what to check, and what not to do. ### WhisperKOOL wine cellar cooling unit error codes 12 codes - [E1 Sensors and probes The controller cannot read the probe that sits in a bottle of liquid, so it has switched to timed cooling.](https://winecellarrepair.center/error-codes/whisperkool-e1/) - [E2 Sensors and probes The sensor on the evaporator coil is disconnected or defective, so the control has lost track of coil temperature.](https://winecellarrepair.center/error-codes/whisperkool-e2/) - [E3 Sensors and probes The sensor that watches the condenser coil on a through-the-wall unit has lost its connection or failed.](https://winecellarrepair.center/error-codes/whisperkool-e3/) - [E7 Power and controller The display keypad and the unit's circuit board have not communicated for 60 seconds.](https://winecellarrepair.center/error-codes/whisperkool-e7/) - [E10 Power and controller The small battery that keeps the controller's clock has run down; cooling is not affected.](https://winecellarrepair.center/error-codes/whisperkool-e10/) - [EA Humidity The drip tray has filled because condensate is not leaving, and the unit will not run until the level drops.](https://winecellarrepair.center/error-codes/whisperkool-ea/) - [AH1 Temperature and alarms The bottle probe reads a set number of degrees above the setpoint: 4°F on most current models, 8°F on some.](https://winecellarrepair.center/error-codes/whisperkool-ah1/) - [AL1 Temperature and alarms The bottle probe reads a set number of degrees below the setpoint.](https://winecellarrepair.center/error-codes/whisperkool-al1/) - [Ad2 Coil icing and defrost The evaporator was still too cold when the Anti-Frost cycle's time limit ended.](https://winecellarrepair.center/error-codes/whisperkool-ad2/) - [Ad3 Coil icing and defrost After an Anti-Frost cycle, the evaporator was still at or below 26°F.](https://winecellarrepair.center/error-codes/whisperkool-ad3/) - [COH Fans and airflow The condenser coil passed 125°F, so the compressor stopped until it cools to 115°F.](https://winecellarrepair.center/error-codes/whisperkool-coh/) - [dEF Mode, not a failure The unit has paused its compressor to clear frost from the evaporator coil.](https://winecellarrepair.center/error-codes/whisperkool-def/) [WhisperKOOL wine cellar cooling unit repair](https://winecellarrepair.center/brands/whisperkool/) ### CellarCool wine cellar cooling unit error codes 9 codes - [E1 Sensors and probes The probe the controller cools to has come loose or failed; on a CX it is the air probe, on other models the bottle probe.](https://winecellarrepair.center/error-codes/cellarcool-e1/) - [E2 Sensors and probes The sensor that tells the controller when the coil is frosting is unplugged or has failed.](https://winecellarrepair.center/error-codes/cellarcool-e2/) - [E7 Power and controller The wall keypad has not heard from the unit's circuit board for a full minute.](https://winecellarrepair.center/error-codes/cellarcool-e7/) - [E10 Power and controller A small clock battery on the controller has run flat; the unit keeps cooling normally.](https://winecellarrepair.center/error-codes/cellarcool-e10/) - [EA Humidity Water has risen in the internal drip tray, and the unit will not run until it drains.](https://winecellarrepair.center/error-codes/cellarcool-ea/) - [AH1 Temperature and alarms The controlling probe reads above the setpoint by the model's alarm margin: 4°F, 8°F or 10°F depending on the series.](https://winecellarrepair.center/error-codes/cellarcool-ah1/) - [AL1 Temperature and alarms The controlling probe reads below the setpoint by the model's alarm margin.](https://winecellarrepair.center/error-codes/cellarcool-al1/) - [Ad2 Coil icing and defrost An Anti-Frost cycle reached its time limit before the evaporator warmed up.](https://winecellarrepair.center/error-codes/cellarcool-ad2/) - [dEF Mode, not a failure The compressor is resting while frost melts off the evaporator.](https://winecellarrepair.center/error-codes/cellarcool-def/) [CellarCool wine cellar cooling unit repair](https://winecellarrepair.center/brands/cellarcool/) ### Wine Guardian wine cellar cooling unit error codes 9 codes - [!1 Compressor and pressure Pressure in the refrigeration circuit went too high, and a hand-reset switch shut the compressor and condenser off.](https://winecellarrepair.center/error-codes/wine-guardian-alarm-1/) - [!2 Humidity The float switch in the drain system sensed water backing up and stopped the unit.](https://winecellarrepair.center/error-codes/wine-guardian-alarm-2/) - [!3 Sensors and probes The sensor that watches the evaporator coil for frost is disconnected, open or shorted.](https://winecellarrepair.center/error-codes/wine-guardian-alarm-3/) - [!4 Power and controller Data is not getting between the sensing device and the main control board.](https://winecellarrepair.center/error-codes/wine-guardian-alarm-4/) - [Flashing temperature with (!) Temperature and alarms The temperature reading flashes with an exclamation mark because the cellar is warmer than the high alarm setting.](https://winecellarrepair.center/error-codes/wine-guardian-high-temperature-alarm/) - [Flashing temperature with (!) below the low limit Temperature and alarms The temperature reading flashes with (!) because the cellar is colder than the low alarm setting.](https://winecellarrepair.center/error-codes/wine-guardian-low-temperature-alarm/) - [Flashing humidity with (!) Humidity The humidity reading flashes with (!) because relative humidity is above the high humidity alarm setting.](https://winecellarrepair.center/error-codes/wine-guardian-high-humidity-alarm/) - [Flashing humidity with (!) below the low limit Humidity The humidity reading flashes with (!) because relative humidity is below the low humidity alarm setting.](https://winecellarrepair.center/error-codes/wine-guardian-low-humidity-alarm/) - [- - - Power and controller The remote interface shows dashes because it has lost communication with the board inside the unit.](https://winecellarrepair.center/error-codes/wine-guardian-dashes/) [Wine Guardian wine cellar cooling unit repair](https://winecellarrepair.center/brands/wine-guardian/) ### Wine-Mate wine cellar cooling unit error codes 8 codes - [P1 Sensors and probes The controller has lost its air probe and runs the compressor on a fixed on-off timer instead.](https://winecellarrepair.center/error-codes/wine-mate-p1/) - [HA Temperature and alarms The probe reads the cellar above the setpoint by more than the high alarm offset, 10° by default.](https://winecellarrepair.center/error-codes/wine-mate-ha/) - [LA Temperature and alarms The probe reads the cellar below the setpoint by more than the low alarm offset, 10° by default.](https://winecellarrepair.center/error-codes/wine-mate-la/) - [CA Power and controller A device wired to the controller's alarm input has triggered, and the controller has turned all its outputs off.](https://winecellarrepair.center/error-codes/wine-mate-ca/) - [HI Temperature and alarms On the earlier Wine-Mate display, the unit has read the cellar above its set limit, and HI flashes.](https://winecellarrepair.center/error-codes/wine-mate-hi/) - [LO Temperature and alarms On the earlier Wine-Mate display, the unit has read the cellar below its set limit, and LO flashes.](https://winecellarrepair.center/error-codes/wine-mate-lo/) - [dF Mode, not a failure dF on the older display means the unit is clearing frost from its coil, which it does once a day for up to half an hour.](https://winecellarrepair.center/error-codes/wine-mate-df/) - [POF Mode, not a failure POF confirms the controller buttons have been locked; PON confirms they have been unlocked.](https://winecellarrepair.center/error-codes/wine-mate-pof/) [Wine-Mate wine cellar cooling unit repair](https://winecellarrepair.center/brands/wine-mate/) ### Breezaire wine cellar cooling unit error codes 6 codes - [E1 Temperature and alarms The cellar started above 75°F and the Sentry III saw too little cooling in the first 45 minutes, so it switched the unit off.](https://winecellarrepair.center/error-codes/breezaire-e1/) - [AL Temperature and alarms The storage temperature has risen past the alarm setting, 62°F from the factory, while the unit keeps running.](https://winecellarrepair.center/error-codes/breezaire-al/) - [OH Temperature and alarms After its first cool-down, the cellar climbed past 75°F, and the Sentry III turned the unit off for at least 30 minutes.](https://winecellarrepair.center/error-codes/breezaire-oh/) - [Er Sensors and probes The controller reads its sensor as broken and turns the unit off, though it can still be run by hand.](https://winecellarrepair.center/error-codes/breezaire-er/) - [LO Sensors and probes The Sentry III is getting a reading under freezing, far below anything a cellar near 55°F should show.](https://winecellarrepair.center/error-codes/breezaire-lo/) - [HI Sensors and probes The Sentry III is receiving a reading over 99°F, higher than a working cellar should ever reach.](https://winecellarrepair.center/error-codes/breezaire-hi/) [Breezaire wine cellar cooling unit repair](https://winecellarrepair.center/brands/breezaire/) ### CellarPro wine cellar cooling unit error codes 6 codes - [P1 Sensors and probes Probe 1, which reads the cellar and switches cooling on and off, is no longer working, so the unit is cooling on a timer.](https://winecellarrepair.center/error-codes/cellarpro-p1/) - [P3 Sensors and probes The probe that watches the condenser coil at the back of the unit has stopped reading.](https://winecellarrepair.center/error-codes/cellarpro-p3/) - [HA Temperature and alarms The cellar air has stayed warmer than the high alarm setting, 70°F from the factory, for more than an hour.](https://winecellarrepair.center/error-codes/cellarpro-ha/) - [HA2 Fans and airflow The condenser probe has read above 140°F, for two hours on 1800 units.](https://winecellarrepair.center/error-codes/cellarpro-ha2/) - [LA Temperature and alarms The cellar air is colder than the low alarm setting, 45°F from the factory.](https://winecellarrepair.center/error-codes/cellarpro-la/) - [LA2 Temperature and alarms The air or coil at the condenser, outside the cellar, is colder than the alarm allows.](https://winecellarrepair.center/error-codes/cellarpro-la2/) [CellarPro wine cellar cooling unit repair](https://winecellarrepair.center/brands/cellarpro/) ### KoolR wine cellar cooling unit error codes 1 code - [AL Temperature and alarms The room went above 72°F, so the KoolR stopped itself, sounded a warning and is blinking AL with the temperature.](https://winecellarrepair.center/error-codes/koolr-al/) [KoolR wine cellar cooling unit repair](https://winecellarrepair.center/brands/koolr/) ### Only confirmed codes Every code here is taken from the manufacturer's own documentation, never from a forum or a parts listing. If yours is not listed, book with the exact characters and the full model number, and we will tell you whether it is one we take. ## Three things before you look it up. A code is a lead, not a verdict. These decide whether the answer you find will be any use. 01 ### Copy the display exactly Write down every character on the controller, or count how many times a light blinks. Take a photo first, because a restart or an outage can clear the code. 02 ### Photograph the rating plate Check the side of the unit's housing, the exhaust end, or the condenser of a split system. The same code means different things from one maker to the next. 03 ### Read the thermometer in the room If the cellar has passed about 70°F, keep the door shut and plan where the best bottles go before anything else. A room still near its setting can wait for a normal slot. ## What each kind of code means. Codes fall into a handful of families. The family says more about the likely repair than the characters do — and one of them is not a repair at all. [How to read a code](https://winecellarrepair.center/problems/cellar-cooling-unit-error-code/) ### Mode, not a failure 4 codes Something the controller was told to do, not a part that wore out: a display switched between Fahrenheit and Celsius so 13 looks alarming, a set point or differential changed by someone leaning on the keys, a keypad lock that ignores every press, a standby state left on after a power cut, a reminder that service is due. The unit is fine, and the controller's own keys or its manual put it back. [dEF](https://winecellarrepair.center/error-codes/cellarcool-def/) [dEF](https://winecellarrepair.center/error-codes/whisperkool-def/) [dF](https://winecellarrepair.center/error-codes/wine-mate-df/) [POF](https://winecellarrepair.center/error-codes/wine-mate-pof/) Usually leads to No repair — the setting is changed back Shows up as [Wine Cellar Too Warm](https://winecellarrepair.center/problems/cellar-too-warm/) [Wine Cellar Too Cold](https://winecellarrepair.center/problems/cellar-too-cold/) [Cellar Cooling Controller Display Blank](https://winecellarrepair.center/problems/cellar-controller-display-blank/) [Cellar Cooling Unit Error Code](https://winecellarrepair.center/problems/cellar-cooling-unit-error-code/) ### Temperature and alarms 17 codes The controller saw the cellar go past a high or low limit and raised an alarm, sometimes holding the worst reading it logged while the house was empty. The reason can be as small as the cellar door left ajar after a tasting or a long outage, a room gaining heat from new lights or a sunny glass wall, or as serious as cooling that has stopped. Keep the door shut and read a thermometer on a middle rack before touching anything; the alarm is a warning about the collection, not yet a diagnosis. [E1](https://winecellarrepair.center/error-codes/breezaire-e1/) [AL](https://winecellarrepair.center/error-codes/breezaire-al/) [OH](https://winecellarrepair.center/error-codes/breezaire-oh/) [AH1](https://winecellarrepair.center/error-codes/cellarcool-ah1/) [AL1](https://winecellarrepair.center/error-codes/cellarcool-al1/) [HA](https://winecellarrepair.center/error-codes/cellarpro-ha/) [LA](https://winecellarrepair.center/error-codes/cellarpro-la/) [LA2](https://winecellarrepair.center/error-codes/cellarpro-la2/) [AL](https://winecellarrepair.center/error-codes/koolr-al/) [AH1](https://winecellarrepair.center/error-codes/whisperkool-ah1/) [AL1](https://winecellarrepair.center/error-codes/whisperkool-al1/) [Flashing temperature with (!)](https://winecellarrepair.center/error-codes/wine-guardian-high-temperature-alarm/) [Flashing temperature with (!) below the low limit](https://winecellarrepair.center/error-codes/wine-guardian-low-temperature-alarm/) [HA](https://winecellarrepair.center/error-codes/wine-mate-ha/) [LA](https://winecellarrepair.center/error-codes/wine-mate-la/) [HI](https://winecellarrepair.center/error-codes/wine-mate-hi/) [LO](https://winecellarrepair.center/error-codes/wine-mate-lo/) Usually leads to [Cellar cooling load and room check](https://winecellarrepair.center/services/cellar-cooling-load-and-room-check/) Shows up as [Wine Cellar Too Warm](https://winecellarrepair.center/problems/cellar-too-warm/) [Wine Cellar Too Cold](https://winecellarrepair.center/problems/cellar-too-cold/) [Cellar Cooling Unit Running Constantly](https://winecellarrepair.center/problems/cellar-unit-running-constantly/) [Cellar Cooling Unit Error Code](https://winecellarrepair.center/problems/cellar-cooling-unit-error-code/) ### Humidity 5 codes The unit or its hygrometer reads the cellar's air as too dry for the corks or too damp for the labels and the walls. Cooling pulls water out of the air, so a unit that runs long in a leaky room tends to dry it out, while a gap in the vapor barrier, damp ground or a clogged drain can push it the other way. A humidifier or humidity kit, where one is fitted, is checked along with the door seal and the room before a sensor is blamed. [EA](https://winecellarrepair.center/error-codes/cellarcool-ea/) [EA](https://winecellarrepair.center/error-codes/whisperkool-ea/) [!2](https://winecellarrepair.center/error-codes/wine-guardian-alarm-2/) [Flashing humidity with (!)](https://winecellarrepair.center/error-codes/wine-guardian-high-humidity-alarm/) [Flashing humidity with (!) below the low limit](https://winecellarrepair.center/error-codes/wine-guardian-low-humidity-alarm/) Usually leads to [Cellar humidity control repair](https://winecellarrepair.center/services/cellar-humidity-control-repair/) Shows up as [Wine Cellar Humidity Too Low](https://winecellarrepair.center/problems/cellar-humidity-too-low/) [Wine Cellar Humidity Too High or Mold](https://winecellarrepair.center/problems/cellar-humidity-too-high-or-mold/) [Condensation on Wine Cellar Walls or Glass](https://winecellarrepair.center/problems/condensation-on-cellar-walls-or-glass/) [Cellar Cooling Unit Error Code](https://winecellarrepair.center/problems/cellar-cooling-unit-error-code/) ### Sensors and probes 12 codes The controller has lost a sensible reading from one of its probes: the one sampling the cellar air, the one on the evaporator coil, or on a remote probe the lead that runs out to a rack. With no number it can trust, the unit may chill the room well below 55°F, stop and start every few minutes, or run on without end. A probe unplugged during a rack install, pinched behind a board or sitting in a draft from the door is ruled out before a new one is ordered. [Er](https://winecellarrepair.center/error-codes/breezaire-er/) [LO](https://winecellarrepair.center/error-codes/breezaire-lo/) [HI](https://winecellarrepair.center/error-codes/breezaire-hi/) [E1](https://winecellarrepair.center/error-codes/cellarcool-e1/) [E2](https://winecellarrepair.center/error-codes/cellarcool-e2/) [P1](https://winecellarrepair.center/error-codes/cellarpro-p1/) [P3](https://winecellarrepair.center/error-codes/cellarpro-p3/) [E1](https://winecellarrepair.center/error-codes/whisperkool-e1/) [E2](https://winecellarrepair.center/error-codes/whisperkool-e2/) [E3](https://winecellarrepair.center/error-codes/whisperkool-e3/) [!3](https://winecellarrepair.center/error-codes/wine-guardian-alarm-3/) [P1](https://winecellarrepair.center/error-codes/wine-mate-p1/) Usually leads to [Cellar controller and sensor repair](https://winecellarrepair.center/services/cellar-controller-and-sensor-repair/) Shows up as [Wine Cellar Too Cold](https://winecellarrepair.center/problems/cellar-too-cold/) [Cellar Cooling Unit Short Cycling](https://winecellarrepair.center/problems/cellar-unit-short-cycling/) [Cellar Cooling Unit Running Constantly](https://winecellarrepair.center/problems/cellar-unit-running-constantly/) [Cellar Cooling Unit Error Code](https://winecellarrepair.center/problems/cellar-cooling-unit-error-code/) ### Coil icing and defrost 3 codes The controller found the evaporator coil too cold for too long, or a defrost cycle that did not finish. Ice grows when warm, moist air keeps arriving and the coil cannot shed it: a set point pushed too low, a blocked return, a slow evaporator fan, a low refrigerant charge, or a door that lets the house in. When the ice melts all at once it can overwhelm the drain, so a leak often follows. Switching the unit off to thaw buys time; finding why it iced is the repair. [Ad2](https://winecellarrepair.center/error-codes/cellarcool-ad2/) [Ad2](https://winecellarrepair.center/error-codes/whisperkool-ad2/) [Ad3](https://winecellarrepair.center/error-codes/whisperkool-ad3/) Usually leads to [Cellar coil icing and defrost repair](https://winecellarrepair.center/services/cellar-coil-icing-and-defrost-repair/) Shows up as [Cellar Cooling Evaporator Coil Icing Up](https://winecellarrepair.center/problems/evaporator-coil-icing-up/) [Cellar Cooling Unit Leaking Water](https://winecellarrepair.center/problems/cellar-unit-leaking-water/) [Wine Cellar Too Warm](https://winecellarrepair.center/problems/cellar-too-warm/) [Cellar Cooling Unit Error Code](https://winecellarrepair.center/problems/cellar-cooling-unit-error-code/) ### Fans and airflow 2 codes A fan the controller counts on is slow, noisy or stopped. On the cellar side one fan pushes cool air across the racks; on the exhaust side, or in a split system's outdoor condenser, another throws the room's heat away. A rack or a case of wine stacked against the grille, a clogged filter, a dust-caked condenser or a tired capacitor is cleared before a motor is replaced. [HA2](https://winecellarrepair.center/error-codes/cellarpro-ha2/) [COH](https://winecellarrepair.center/error-codes/whisperkool-coh/) Usually leads to [Cellar evaporator and condenser fan repair](https://winecellarrepair.center/services/cellar-evaporator-and-condenser-fan-repair/) Shows up as [Cellar Cooling Unit Fan Not Running](https://winecellarrepair.center/problems/cellar-unit-fan-not-running/) [Cellar Cooling Unit Loud or Vibrating](https://winecellarrepair.center/problems/cellar-unit-loud-or-vibrating/) [Cellar Cooling Unit Exhaust Overheating](https://winecellarrepair.center/problems/cellar-unit-exhaust-overheating/) [Cellar Cooling Unit Error Code](https://winecellarrepair.center/problems/cellar-cooling-unit-error-code/) ### Compressor and pressure 1 code The sealed system has stepped outside safe limits: a high-pressure switch opened because the heat had nowhere to go, a low-pressure switch opened because refrigerant is short, or the compressor would not start or kept tripping its own overload. Very often the cause is the exhaust side, a closet or garage too hot or too small for the unit, before it is the compressor. Handling refrigerant takes EPA Section 608 certification, and the unit's age weighs heavily on the decision. [!1](https://winecellarrepair.center/error-codes/wine-guardian-alarm-1/) Usually leads to [Cellar compressor and sealed system repair](https://winecellarrepair.center/services/cellar-compressor-and-sealed-system-repair/) Shows up as [Wine Cellar Too Warm](https://winecellarrepair.center/problems/cellar-too-warm/) [Cellar Cooling Unit Exhaust Overheating](https://winecellarrepair.center/problems/cellar-unit-exhaust-overheating/) [Cellar Cooling Unit Short Cycling](https://winecellarrepair.center/problems/cellar-unit-short-cycling/) [Cellar Cooling Unit Error Code](https://winecellarrepair.center/problems/cellar-cooling-unit-error-code/) ### Power and controller 7 codes The unit saw its supply dip, surge or drop out, or the controller has lost contact with the board it drives. The cause is as often a shared circuit, a tripped GFCI outlet, a loose connection or a storm outage as the unit itself. A breaker that will not stay on or a scorched smell means switching the circuit off at the panel, standing dry and away from the unit, and keeping the cellar door closed until the technician arrives. [E7](https://winecellarrepair.center/error-codes/cellarcool-e7/) [E10](https://winecellarrepair.center/error-codes/cellarcool-e10/) [E7](https://winecellarrepair.center/error-codes/whisperkool-e7/) [E10](https://winecellarrepair.center/error-codes/whisperkool-e10/) [!4](https://winecellarrepair.center/error-codes/wine-guardian-alarm-4/) [- - -](https://winecellarrepair.center/error-codes/wine-guardian-dashes/) [CA](https://winecellarrepair.center/error-codes/wine-mate-ca/) Usually leads to [Wine cellar cooling diagnostic visit](https://winecellarrepair.center/services/diagnostic-visit/) Shows up as [Cellar Cooling Unit Not Turning On](https://winecellarrepair.center/problems/cellar-unit-not-turning-on/) [Cellar Cooling Unit Tripping the Breaker](https://winecellarrepair.center/problems/cellar-unit-tripping-breaker/) [Burning Smell From a Cellar Cooling Unit](https://winecellarrepair.center/problems/cellar-unit-burning-smell/) [Cellar Cooling Controller Display Blank](https://winecellarrepair.center/problems/cellar-controller-display-blank/) [Cellar Cooling Unit Error Code](https://winecellarrepair.center/problems/cellar-cooling-unit-error-code/) For the heart of your home. ## Questions about the codes. ### My cellar controller shows a code with no page here. What now? We publish a code only when the maker documents it in a manual or on its own support site. Until then, write the code exactly as shown, count any blinks, and put both in the booking form; the technician checks it against your model. ### Does the same code mean the same thing on every cellar unit? No. One maker uses a code for a high room reading where another uses it for a failed probe, and controllers change between generations of the same unit. Read a code together with the make and, ideally, the model number. ### Can I clear a code on the cellar controller myself? Often, by acknowledging the alarm on the controller or switching the unit off for a few minutes and letting it restart. If the code stays away, it may have come from a long session in the cellar with the door open; if it returns the same day, something needs looking at. With the room warming, keep the door shut and book rather than resetting it again and again. ### The controller shows a code but the cellar is fine. Is a repair needed? Not always. Some codes are settings or reminders rather than failures: a display switched to the other temperature scale, a service reminder or a lock on the keys. Those pages explain how to put the setting back without a part. --- **[Read on the site: Wine Cellar Cooling Unit Error Codes — What They Mean](https://winecellarrepair.center/error-codes/)** **[Book a visit with WineCellarRepair.center](https://winecellarrepair.center/schedule/)**