--- title: "WhisperKOOL E2: the evaporator probe connection has failed" description: "What E2 means on WhisperKOOL E2: the evaporator probe connection has faileds, what to check before booking, and when it is not a failure at all." url: "https://winecellarrepair.center/error-codes/whisperkool-e2/" --- # WhisperKOOL E2: the evaporator probe connection has failed E2 points at the evaporator probe, the sensor on the cold coil that starts and ends Anti-Frost cycles. ## What E2 actually means. E2 points at the evaporator probe, the sensor on the cold coil that starts and ends Anti-Frost cycles. Its two-pin plug belongs on the PB2 terminal of the board (or on the back of the controller on SC PRO units). With the probe gone, the controller cannot judge frost on the coil, which is how an unnoticed E2 can end in an iced evaporator. WhisperKOOL wine cellar cooling unit display · also shown as “E2” What to do when E2 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 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. ### Make WhisperKOOL WhisperKOOL systems serviced where they are installed, whether the cellar is warming, the coil is frosting or the unit never rests. ### Source WhisperKOOL Platinum Split 4000/8000 owner's manual (01/2022) Shown by both WhisperKOOL controller families: the digital controller on Platinum Split, Ceiling Mount, Extreme tiR and Phantom, and the SC PRO and Slimline LS through-the-wall controller. ## Before you book, in this order. Each step comes from WhisperKOOL's own guidance for E2 on its wine cellar cooling units. Follow it to the end: the last card says whether this is a visit. 01 Check the evaporator through the grille for frost or ice; if ice is building, turn the unit off and let the coil thaw with towels under it. 02 Note whether the unit is still cooling the cellar normally. 03 Book a visit to reseat or replace the evaporator probe; the unit has to be opened to reach it. ### 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 E2 is not the bottle probe that controls the cellar temperature; that one reports as E1. An E2 on its own rarely warms the cellar at first, but ice can build if it is left for weeks. ## What you may notice with it. The wine cellar cooling unit problems E2 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 Evaporator Coil Icing Up](https://winecellarrepair.center/problems/evaporator-coil-icing-up/) [All 5 causes, cheapest first](https://winecellarrepair.center/problems/evaporator-coil-icing-up/) It also comes with - [**Cellar Cooling Unit Error Code**](https://winecellarrepair.center/problems/cellar-cooling-unit-error-code/) Problem ### Cellar Cooling Evaporator Coil Icing Up 5 causes, cheapest first Where E2 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/) ## WhisperKOOL wine cellar cooling units. WhisperKOOL systems serviced where they are installed, whether the cellar is warming, the coil is frosting or the unit never rests. [WhisperKOOL wine cellar cooling unit repair](https://winecellarrepair.center/brands/whisperkool/) More WhisperKOOL codes [E1](https://winecellarrepair.center/error-codes/whisperkool-e1/) [E3](https://winecellarrepair.center/error-codes/whisperkool-e3/) [E7](https://winecellarrepair.center/error-codes/whisperkool-e7/) [E10](https://winecellarrepair.center/error-codes/whisperkool-e10/) [EA](https://winecellarrepair.center/error-codes/whisperkool-ea/) [AH1](https://winecellarrepair.center/error-codes/whisperkool-ah1/) [AL1](https://winecellarrepair.center/error-codes/whisperkool-al1/) [Ad2](https://winecellarrepair.center/error-codes/whisperkool-ad2/) [Ad3](https://winecellarrepair.center/error-codes/whisperkool-ad3/) [COH](https://winecellarrepair.center/error-codes/whisperkool-coh/) [dEF](https://winecellarrepair.center/error-codes/whisperkool-def/) Sensors and probes on other makes [Breezaire Er](https://winecellarrepair.center/error-codes/breezaire-er/) [CellarCool E1](https://winecellarrepair.center/error-codes/cellarcool-e1/) [CellarPro P1](https://winecellarrepair.center/error-codes/cellarpro-p1/) [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) WhisperKOOL 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. WhisperKOOL 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. WhisperKOOL 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 WhisperKOOL's own words > The two-pin connector for the evaporator probe should be connected to the CPB/PB2 terminal on the circuit board. [WhisperKOOL Platinum Split 4000/8000 owner's manual (01/2022)](https://whisperkool.com/wp-content/uploads/2022/01/WK-Platinum_Split_4000-8000_OM_NO_UV_220HE_012422.pdf) [WhisperKOOL SC PRO Series owner's manual (12/2022)](https://whisperkool.com/wp-content/uploads/2022/12/WK-SC-Series-OM-22-w-UV-120122.pdf) [WhisperKOOL Platinum Split 4000/8000 owner's manual (01/2022)](https://whisperkool.com/wp-content/uploads/2022/01/WK-Platinum_Split_4000-8000_OM_NO_UV_220HE_012422.pdf) Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Shown by both WhisperKOOL controller families: the digital controller on Platinum Split, Ceiling Mount, Extreme tiR and Phantom, and the SC PRO and Slimline LS through-the-wall controller. ## WhisperKOOL E2 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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Check the evaporator through the grille for frost or ice; if ice is building, turn the unit off and let the coil thaw with towels under it. If it comes back, it needs a visit. ### Does E2 stop my WhisperKOOL from cooling? Not directly. The unit keeps cooling on the bottle probe, but it has lost the reading it uses to control defrost. ### Why would the WhisperKOOL evaporator probe come loose? The two-pin plug can work loose after vibration or service work inside the unit, and the wire can be pinched when a panel is refitted. ### What happens if I ignore E2 on a WhisperKOOL? The coil can frost over without an Anti-Frost cycle to clear it, and an iced coil moves less air and can overflow the drain pan. --- **[Read on the site: WhisperKOOL E2: the evaporator probe connection has failed](https://winecellarrepair.center/error-codes/whisperkool-e2/)** **[Book a visit with WineCellarRepair.center](https://winecellarrepair.center/schedule/)**