Cellar Cooling Unit Not Turning On
A cellar cooling unit not turning on stays silent and dark: no fan, no hum from the compressor, no light on the controller, while the cellar thermometer slowly drifts upward.
Mon–Sat, 8am–8pm
- 5 checks before you book
- 5 questions that narrow it
- 5 causes, cheapest first
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What it
usually means.
Before a cellar unit does anything it needs power at its outlet or hard-wired circuit, a controller that is awake, and a call for cooling from that controller. A unit that stays completely dead is usually missing the first of those: a tripped breaker or GFCI, a loose plug, a switch in the cellar that someone turned off, or a remote controller that lost its connection. If the controller lights but nothing runs, the room may already be at the set point, the unit may be waiting out a built-in delay after a power cut, or a sensor may be telling it the room is cold. Only after those are ruled out does it point to the controller board, its transformer, or wiring inside the unit. A cellar without cooling is not an emergency on the first day if the door is shut, but watch the thermometer, because on a hot week the room will not stay cool for long.
The 5 causes, cheapest first
Answer these first
Is anything lit on the unit or on a wall-mounted controller in the cellar?
Has any breaker or GFCI outlet tripped, and does a lamp work in the unit's outlet?
Is there a wall switch that controls the unit, perhaps shared with the cellar lights?
What is the set temperature, and what does the room read right now?
Was there a storm, an outage or electrical work shortly before it stopped?
Check these
before you book.
Cellar cooling unit not turning on: 5 checks, and none of them costs anything.
Check the breaker and any GFCI outlet, and reset once only from a dry panel with dry hands.
Keep the cellar door shut while it is off and watch the thermometer; move the most valuable bottles if the room passes about 70°F.
Lower the set temperature by a few degrees and wait a quarter of an hour, in case the unit is simply satisfied or in a start delay.
Also worth checking
- On a split system, check whether the outdoor disconnect switch near the condenser is on.
- Tell us the make, the model number and whether anything on the unit lights up.
How soon does it need a visit?
Not urgent on the first day with the door shut in mild weather. Book soon, and sooner in a heat wave; if the room passes about 70°F, move the bottles that matter most.
The causes,
cheapest first.
5 things cellar cooling unit not turning on turns out to be, from power off at the breaker, gfci or switch to controller board or transformer failed.
The cost guide-
01 no repair
Power off at the breaker, GFCI or switch
A tripped breaker, a GFCI that clicked off, or a wall switch turned off with the lights is the most common reason for a silent unit. Reset once from a dry panel and see whether it holds.
-
02 no repair
Start delay after a power cut
Many units wait several minutes after power returns before starting the compressor, to protect it. Give it a quarter of an hour before judging.
-
03 low to moderate
Sensor or setting telling it the room is cold
A set point too high, or a room sensor that has drifted or come loose from its clip, can keep the controller from ever calling for cooling.
-
04 low to moderate
Wiring between a split system's two halves
On a split system the evaporator and the condenser are joined by control wiring as well as copper. A broken wire or a tripped disconnect at the outdoor half stops the whole system.
-
05 moderate
Controller board or transformer failed
A board damaged by a surge, or a small transformer that no longer feeds it, leaves the whole unit dark even with power at the outlet.
-
What it costs
Every repair on the site's cost scale, side by side
Open the cost guide
What else
it could be.
Most often confused with cellar cooling controller display blank, then cellar cooling unit tripping the breaker.
All problems
The makes
it happens on.
7 makes on this site; cellar cooling unit not turning on can show up on any of them. Each mark opens that make's own page.
All 7 brandsCellar Cooling Unit Not Turning On,
where we come out.
9 metros, each with its own page.
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
cellar cooling unit not turning on.
My cellar unit came back after an outage but will not cool. Why?
Is the wall switch in my cellar supposed to control the unit?
Can a surge protector keep this from happening again?
How do I know whether it is the unit or the outlet?
Back to your everyday
Still seeing cellar cooling unit not turning on?
Book with what you checked above — 5 answers save the technician the first part of the visit.