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A thin temperature probe lead taped along the side of a wooden wine rack in a cellar, its small metal tip hanging among unlabeled bottles, the wire running up toward the cooling unit's grille.

Breezaire LO: the sensor is reading below 32°F

LO flashes when the temperature input drops below 32°F.

(844) 398-5977

Mon–Sat, 8am–8pm

  • Sensors and probes
  • Cellar controller and sensor repair
  • Source: Breezaire

Book a visit

Three short steps, about a minute.

or call (844) 398-5977

What LO
actually means.

LO flashes when the temperature input drops below 32°F. In a room kept near 55°F, that points to the sensor, its wiring or where a probe is sitting, rather than to a frozen cellar. Breezaire separately flashes the plain temperature once the reading falls below 43°F, as an earlier prompt.

Breezaire wine cellar cooling unit display · also shown as Lo

What to do when LO shows on the wine cellar cooling unit

Kind 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 Unit Error Code

A cellar cooling unit error code appears as letters or digits on the controller, a flashing reading, a blinking light on the unit, or an alarm tone, sometimes while the cellar still holds its temperature.

MakeBreezaire

Visits to cellars cooled by a Breezaire unit, starting with a thermometer among the racks and a hand at the exhaust grille.

SourceBreezaire Sentry III Plus Controller owner's manual

Sentry III and Sentry III Plus controllers on WKL through-the-wall units and WKSL split systems. Older WKS splits built before mid-2010 used a manual thermostat and show none of these codes.

Before you book,
in this order.

Each step comes from Breezaire's own guidance for LO on its wine cellar cooling units. Follow it to the end: the last card says whether this is a visit.

01

Read the cellar with a separate thermometer; if it is near your setpoint, the sensor reading is the problem.

02

If a bottle probe is used, check that it has not ended up in the cold air outlet or against a cold surface.

03

If the room really is near freezing, unplug the unit and keep the door shut; Breezaire units only cool and have no heater.

04

If the thermometer and the display disagree, book a visit so the sensor circuit can be measured.

Still there?

It usually turns into cellar controller and sensor repair. Book with the code and the model number.

What not to do

LO is not the same as a cellar running a few degrees cold, which the Sentry III shows by flashing the temperature below 43°F. It is not Er either, because with LO the sensor still answers, just with a value too low to trust.

What you may
notice with it.

The wine cellar cooling unit problems LO tends to arrive with. Answer these at the wine cellar cooling unit before anyone is booked.

All problems

Before you call

Cellar Cooling Unit Error Code

All 8 causes, cheapest first

It also comes with

The small controller panel on the cellar side of a through-the-wall cooling unit, its display glowing with abstract amber segments beside the slotted supply grille, the top row of a wooden wine rack with unlabeled bottles just below. Problem

Cellar Cooling Unit Error Code

8 causes, cheapest first

Where LO usually leads

Cellar controller and sensor repair.

Air or coil probe, display, transformer or control board · moderate.
Book a visit What the job involves

Breezaire
wine cellar cooling units.

Visits to cellars cooled by a Breezaire unit, starting with a thermometer among the racks and a hand at the exhaust grille.

Breezaire wine cellar cooling unit repair

More Breezaire codes

E1ALOHErHI

Sensors and probes on other makes

CellarCool E1CellarPro P1WhisperKOOL E1Wine Guardian !3Wine-Mate P1
All 10 codes of this kind
A wine cellar cooling unit set into the upper part of a stone wall in a US home wine cellar, its cellar-side grille flush with the wall above dark wood racks full of wine bottles, cool soft lighting. Breezaire 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.

 A slim white split-system wine cellar evaporator unit mounted high on a plastered wall of a US home wine cellar above curved wooden racks of wine bottles without labels, insulated copper lines entering the wall beside it, warm low lighting. Breezaire 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 Breezaire's own words

If the temperature sensor inputs below 32°F (0°C) the display will flash “LO”
Breezaire Sentry III Plus Controller owner's manual Breezaire Sentry III Plus Controller owner's manual Breezaire WKL Series installation instructions

Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Sentry III and Sentry III Plus controllers on WKL through-the-wall units and WKSL split systems. Older WKS splits built before mid-2010 used a manual thermostat and show none of these codes.

Breezaire LO 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 areas

Tampa BayFL · 31 areas

OrlandoFL · 30 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

San Francisco Bay AreaCA · 74 areas

A couple lifting a bottle from a lit stone-walled wine cellar, the cooling unit's grille high on the far wall
For the heart of your home.

Questions
about LO.

Can I clear LO myself?
Read the cellar with a separate thermometer; if it is near your setpoint, the sensor reading is the problem. If it comes back, it needs a visit.
My cellar reads 55°F on a thermometer, so why does the Breezaire show LO?
The controller is receiving a value under 32°F that the room does not match. A damaged sensor, a pinched cord or a probe sitting in the cold discharge can each produce it.
Can a Breezaire freeze the cellar?
It only cools and has no heater, so a cold basement in winter can drift below your setpoint with the unit idle. If the room is genuinely that cold, the cause is outside the unit and LO is simply reporting it.
What is the difference between LO and a flashing temperature on a Breezaire?
A flashing number means the reading is below 43°F, a real but unusual chill. LO means the input is below 32°F, a value the controller flags for you to check.

Back to your everyday

Still showing LO?

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.

Schedule a repair Call (844) 398-5977
(844) 398-5977 Schedule a repair