CellarCool dEF: the unit is defrosting its coil
dEF, shown as Def on the CX, is CellarCool's defrost display.
Mon–Sat, 8am–8pm
- Mode, not a failure
- No repair needed
- Source: CellarCool
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What dEF
actually means.
dEF, shown as Def on the CX, is CellarCool's defrost display. On Ceiling Mount, split and Ultimate units a cycle starts when the evaporator probe holds at 26°F for a minute. The CX works on time instead: after two hours of compressor running it stops for five minutes with the dripping snowflake shown. Both return to cooling by themselves.
CellarCool wine cellar cooling unit display · also shown as Def, “Def”, “dEF”
What to do when dEF shows on the wine cellar cooling unitKind of codeMode, not a failure
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.
Usually leads toNo repair
No action is needed during a defrost.
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)
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 dEF on its wine cellar cooling units. Follow it to the end: the last card says whether this is a visit.
No action is needed during a defrost.
If defrost seems to run far more often than before, clean the evaporator filter and check the air paths.
If an Ad2 alarm appears, follow that code instead.
Cleared?
The controller has stopped showing the code and the cellar is drifting back to its set point without any new part. If the code returns within the week, or the room creeps warm again, book a visit and tell us it came back.
What not to do
dEF is normal operation, not a code about a failed part. On a CX the timed defrost will happen even when the coil has no frost.
What you may
notice with it.
The wine cellar cooling unit problems dEF tends to arrive with. Answer these at the wine cellar cooling unit before anyone is booked.
All problems
No repair indicated
Nothing to repair.
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.
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
Anti-Frost Cycle is running, “dEF” will be displayed on the screen.
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 dEF 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 dEF.
Can I clear dEF myself?
Why does my CellarCool CX stop cooling every two hours?
Is the CellarCool fan supposed to run during dEF?
How long does a CellarCool defrost take?
Back to your everyday
Still showing dEF?
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.