--- title: "CellarCool AL1: the cellar has fallen below the low alarm limit" description: "What AL1 means on CellarCool AL1: the cellar has fallen below the low alarm limits, what to check before booking, and when it is not a failure at all." url: "https://winecellarrepair.center/error-codes/cellarcool-al1/" --- # CellarCool AL1: the cellar has fallen below the low alarm limit AL1 uses the same margin as AH1 on each CellarCool series, just below the setpoint instead of above. ## What AL1 actually means. AL1 uses the same margin as AH1 on each CellarCool series, just below the setpoint instead of above. CellarCool's first check is whether the unit is still cooling: if the snowflake is lit, the unit is overshooting; if not, the cellar is losing heat to a cold space and needs warming from outside the unit. CellarCool wine cellar cooling unit display · also shown as “AL1” What to do when AL1 shows on the wine cellar cooling unit ### Kind of code Temperature and alarms 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. ### Usually leads to 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. ### Shows up as 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. ### Make CellarCool Service for CellarCool systems when the wine room drifts warm, turns dry or the unit starts and stops every few minutes. ### Source CellarCool CM2500 (Ceiling Mount split) manual, version 4 (02/2022) Both CellarCool controller types: the CX through-the-wall controller and the digital controller on Ceiling Mount, split and Ultimate models. ## Before you book, in this order. Each step comes from CellarCool's own guidance for AL1 on its wine cellar cooling units. Follow it to the end: the last card says whether this is a visit. 01 Look for the snowflake on the display; if it is lit while the cellar is already cold, switch the unit off and book a visit. 02 If the unit is idle, warm the room gently until the wine returns to the setpoint. 03 Check the probe against a known thermometer; CellarCool's digital controller manuals include a probe calibration check in the user menu. ### Still there? It usually turns into [cellar cooling load and room check](https://winecellarrepair.center/services/cellar-cooling-load-and-room-check/). Book with the code and the model number. ### What not to do AL1 alone does not mean refrigerant or compressor trouble. In winter it is often just the cellar's surroundings. ## What you may notice with it. The wine cellar cooling unit problems AL1 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 ### [Wine Cellar Too Cold](https://winecellarrepair.center/problems/cellar-too-cold/) [All 4 causes, cheapest first](https://winecellarrepair.center/problems/cellar-too-cold/) It also comes with - [**Cellar Cooling Unit Error Code**](https://winecellarrepair.center/problems/cellar-cooling-unit-error-code/) Problem ### Wine Cellar Too Cold 4 causes, cheapest first Where AL1 usually leads ## Cellar cooling load and room check. **Cooling load and room survey · lowest.** Book a visit [What the job involves](https://winecellarrepair.center/services/cellar-cooling-load-and-room-check/) ## CellarCool wine cellar cooling units. Service for CellarCool systems when the wine room drifts warm, turns dry or the unit starts and stops every few minutes. [CellarCool wine cellar cooling unit repair](https://winecellarrepair.center/brands/cellarcool/) More CellarCool codes [E1](https://winecellarrepair.center/error-codes/cellarcool-e1/) [E2](https://winecellarrepair.center/error-codes/cellarcool-e2/) [E7](https://winecellarrepair.center/error-codes/cellarcool-e7/) [E10](https://winecellarrepair.center/error-codes/cellarcool-e10/) [EA](https://winecellarrepair.center/error-codes/cellarcool-ea/) [AH1](https://winecellarrepair.center/error-codes/cellarcool-ah1/) [Ad2](https://winecellarrepair.center/error-codes/cellarcool-ad2/) [dEF](https://winecellarrepair.center/error-codes/cellarcool-def/) Temperature and alarms on other makes [Breezaire E1](https://winecellarrepair.center/error-codes/breezaire-e1/) [CellarPro HA](https://winecellarrepair.center/error-codes/cellarpro-ha/) [KoolR AL](https://winecellarrepair.center/error-codes/koolr-al/) [WhisperKOOL AH1](https://winecellarrepair.center/error-codes/whisperkool-ah1/) [Wine Guardian Flashing temperature with (!)](https://winecellarrepair.center/error-codes/wine-guardian-high-temperature-alarm/) [Wine-Mate HA](https://winecellarrepair.center/error-codes/wine-mate-ha/) [All 16 codes of this kind](https://winecellarrepair.center/error-codes/#family-temperature) CellarCool 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. CellarCool builds this ### 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. CellarCool 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 CellarCool's own words > The bottle probe is sensing a temperature that is 4°F below the setpoint [CellarCool CM2500 (Ceiling Mount split) manual, version 4 (02/2022)](https://www.cellarcool.com/wp-content/uploads/2022/02/CC_CM2500_Manual_110V_022522.pdf) [CellarCool CX Series owner's manual (06/2019)](https://www.cellarcool.com/wp-content/uploads/2021/10/CC-CX_Series-OM-061219.pdf) [CellarCool CX Series owner's manual (06/2019)](https://www.cellarcool.com/wp-content/uploads/2021/10/CC-CX_Series-OM-061219.pdf) Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Both CellarCool controller types: the CX through-the-wall controller and the digital controller on Ceiling Mount, split and Ultimate models. ## CellarCool AL1 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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Look for the snowflake on the display; if it is lit while the cellar is already cold, switch the unit off and book a visit. If it comes back, it needs a visit. ### Can a CellarCool heat the cellar? No. CellarCool's answer to AL1 is to add heat to the room itself. ### Why would a CellarCool keep cooling below its setpoint? A probe out of its bottle or out of calibration, or a relay that does not release, can keep it running. That needs a visit. ### Is AL1 on a CellarCool CX different? Only in the margin: the CX alarms 10° below the setpoint because it reads air. --- **[Read on the site: CellarCool AL1: the cellar has fallen below the low alarm limit](https://winecellarrepair.center/error-codes/cellarcool-al1/)** **[Book a visit with WineCellarRepair.center](https://winecellarrepair.center/schedule/)**