CellarCool E2: the evaporator coil probe has lost its connection
E2 on a CellarCool Ceiling Mount, split or Ultimate unit names the evaporator probe, plugged into the PB2 terminal of the circuit board.
Mon–Sat, 8am–8pm
- Sensors and probes
- Cellar controller and sensor repair
- Source: CellarCool
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What E2
actually means.
E2 on a CellarCool Ceiling Mount, split or Ultimate unit names the evaporator probe, plugged into the PB2 terminal of the circuit board. The controller uses it to start Anti-Frost cycles at about 26°F. Without it, frost can pile up on the coil unnoticed, and the first thing an owner sees may be weaker airflow or water under the unit.
CellarCool wine cellar cooling unit display
What to do when E2 shows on the wine cellar cooling unitKind of codeSensors 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 toCellar 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 asCellar 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.
MakeCellarCool
Service for CellarCool systems when the wine room drifts warm, turns dry or the unit starts and stops every few minutes.
SourceCellarCool CM2500 (Ceiling Mount split) manual, version 4 (02/2022)
CellarCool split, Ceiling Mount and fully ducted Ultimate controllers (CM2500, 3500-S/5000-S, Ultimate-R manuals). The CX through-the-wall series does not list this code.
Before you book,
in this order.
Each step comes from CellarCool'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.
Look at the evaporator coil for frost; if ice has formed, switch the unit off and let it melt, protecting racks and floor from the water.
Keep an eye on the cellar temperature, which the bottle probe still controls.
Book a visit to reseat or replace the evaporator probe inside the unit.
Still there?
It usually turns into cellar controller and sensor repair. Book with the code and the model number.
What not to do
E2 is not the cellar temperature probe, so the setpoint still holds at first. The risk grows over days, as the coil ices without a defrost trigger.
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
Where E2 usually leads
Cellar controller and sensor repair.
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
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.
In CellarCool's own words
Faulty evaporator probe connection
Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. CellarCool split, Ceiling Mount and fully ducted Ultimate controllers (CM2500, 3500-S/5000-S, Ultimate-R manuals). The CX through-the-wall series does not list this code.
CellarCool 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.
All service areasTampa BayFL · 31 areas
Miami / South FloridaFL · 47 areas
New York MetroNY · 75 areas
HoustonTX · 36 areas
ChicagoIL · 50 areas
Los AngelesCA · 95 areas
San DiegoCA · 31 areas
Questions
about E2.
Can I clear E2 myself?
Can CellarCool E2 lead to a water leak?
Does the CellarCool CX series show E2?
Is replacing a CellarCool evaporator probe a big job?
Back to your everyday
Still showing E2?
When you book, type the code or the blink count as the controller shows it, add the full model number, and say what the thermometer in the cellar reads now — that gives the technician a head start.