--- title: "Breezaire LO: the sensor is reading below 32°F" description: "What LO means on Breezaire LO: the sensor is reading below 32°Fs, what to check before booking, and when it is not a failure at all." url: "https://winecellarrepair.center/error-codes/breezaire-lo/" --- # Breezaire LO: the sensor is reading below 32°F LO flashes when the temperature input drops below 32°F. ## What LO actually means. LO flashes when the temperature input drops below 32°F. In a room kept near 55°F, that points to the sensor, its wiring or where a probe is sitting, rather than to a frozen cellar. Breezaire separately flashes the plain temperature once the reading falls below 43°F, as an earlier prompt. Breezaire wine cellar cooling unit display · also shown as Lo What to do when LO shows on the wine cellar cooling unit ### Kind of code Sensors and probes 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. ### Usually leads to 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. ### Shows up as 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. ### Make Breezaire Visits to cellars cooled by a Breezaire unit, starting with a thermometer among the racks and a hand at the exhaust grille. ### Source Breezaire Sentry III Plus Controller owner's manual Sentry III and Sentry III Plus controllers on WKL through-the-wall units and WKSL split systems. Older WKS splits built before mid-2010 used a manual thermostat and show none of these codes. ## Before you book, in this order. Each step comes from Breezaire's own guidance for LO on its wine cellar cooling units. Follow it to the end: the last card says whether this is a visit. 01 Read the cellar with a separate thermometer; if it is near your setpoint, the sensor reading is the problem. 02 If a bottle probe is used, check that it has not ended up in the cold air outlet or against a cold surface. 03 If the room really is near freezing, unplug the unit and keep the door shut; Breezaire units only cool and have no heater. 04 If the thermometer and the display disagree, book a visit so the sensor circuit can be measured. ### Still there? It usually turns into [cellar controller and sensor repair](https://winecellarrepair.center/services/cellar-controller-and-sensor-repair/). Book with the code and the model number. ### What not to do LO is not the same as a cellar running a few degrees cold, which the Sentry III shows by flashing the temperature below 43°F. It is not Er either, because with LO the sensor still answers, just with a value too low to trust. ## What you may notice with it. The wine cellar cooling unit problems LO tends to arrive with. Answer these at the wine cellar cooling unit before anyone is booked. [All problems](https://winecellarrepair.center/problems/) Before you call ### [Cellar Cooling Unit Error Code](https://winecellarrepair.center/problems/cellar-cooling-unit-error-code/) [All 8 causes, cheapest first](https://winecellarrepair.center/problems/cellar-cooling-unit-error-code/) It also comes with - [**Wine Cellar Too Cold**](https://winecellarrepair.center/problems/cellar-too-cold/) Problem ### Cellar Cooling Unit Error Code 8 causes, cheapest first Where LO usually leads ## Cellar controller and sensor repair. **Air or coil probe, display, transformer or control board · moderate.** Book a visit [What the job involves](https://winecellarrepair.center/services/cellar-controller-and-sensor-repair/) ## Breezaire wine cellar cooling units. Visits to cellars cooled by a Breezaire unit, starting with a thermometer among the racks and a hand at the exhaust grille. [Breezaire wine cellar cooling unit repair](https://winecellarrepair.center/brands/breezaire/) More Breezaire codes [E1](https://winecellarrepair.center/error-codes/breezaire-e1/) [AL](https://winecellarrepair.center/error-codes/breezaire-al/) [OH](https://winecellarrepair.center/error-codes/breezaire-oh/) [Er](https://winecellarrepair.center/error-codes/breezaire-er/) [HI](https://winecellarrepair.center/error-codes/breezaire-hi/) Sensors and probes on other makes [CellarCool E1](https://winecellarrepair.center/error-codes/cellarcool-e1/) [CellarPro P1](https://winecellarrepair.center/error-codes/cellarpro-p1/) [WhisperKOOL E1](https://winecellarrepair.center/error-codes/whisperkool-e1/) [Wine Guardian !3](https://winecellarrepair.center/error-codes/wine-guardian-alarm-3/) [Wine-Mate P1](https://winecellarrepair.center/error-codes/wine-mate-p1/) [All 10 codes of this kind](https://winecellarrepair.center/error-codes/#family-sensor) Breezaire builds this ### 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. Breezaire builds this ### 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. ## In Breezaire's own words > If the temperature sensor inputs below 32°F (0°C) the display will flash “LO” [Breezaire Sentry III Plus Controller owner's manual](https://breezaire.com/wp-content/uploads/2023/06/SENTRY-III-Owners-Manual.pdf) [Breezaire Sentry III Plus Controller owner's manual](https://breezaire.com/wp-content/uploads/2023/06/SENTRY-III-Owners-Manual.pdf) [Breezaire WKL Series installation instructions](https://breezaire.com/wp-content/uploads/2025/02/WKL-Instruction-Jan-2025.pdf) Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Sentry III and Sentry III Plus controllers on WKL through-the-wall units and WKSL split systems. Older WKS splits built before mid-2010 used a manual thermostat and show none of these codes. ## Breezaire LO wine cellar cooling unit repair, where we come out. The same visit in every metro below: the code, the model number, and a diagnosis before any part is ordered. 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Read the cellar with a separate thermometer; if it is near your setpoint, the sensor reading is the problem. If it comes back, it needs a visit. ### My cellar reads 55°F on a thermometer, so why does the Breezaire show LO? The controller is receiving a value under 32°F that the room does not match. A damaged sensor, a pinched cord or a probe sitting in the cold discharge can each produce it. ### Can a Breezaire freeze the cellar? It only cools and has no heater, so a cold basement in winter can drift below your setpoint with the unit idle. If the room is genuinely that cold, the cause is outside the unit and LO is simply reporting it. ### What is the difference between LO and a flashing temperature on a Breezaire? A flashing number means the reading is below 43°F, a real but unusual chill. LO means the input is below 32°F, a value the controller flags for you to check. --- **[Read on the site: Breezaire LO: the sensor is reading below 32°F](https://winecellarrepair.center/error-codes/breezaire-lo/)** **[Book a visit with WineCellarRepair.center](https://winecellarrepair.center/schedule/)**