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A stainless sandwich prep table on a restaurant line, the prep table's lid raised over a row of covered food pans, a probe thermometer standing in one pan, nobody at the table.

Traulsen CLO: the cabinet has become too cold

CLO is the cold counterpart of CHI on R & A Series controls.

(844) 571-4566

Mon–Sat, 8am–8pm

  • Temperature and alarms
  • Reach-in and prep table repair
  • Source: Traulsen

Book a visit

Three short steps, about a minute.

or call (844) 571-4566

What CLO
actually means.

CLO is the cold counterpart of CHI on R & A Series controls. Traulsen's first suggestion for a cabinet that is too cold is a large load of very cold or frozen food, which pulls the air down until the cabinet recovers. If that is not the case, the set point may be too low.

Traulsen commercial appliance display

What to do when CLO shows on the commercial appliance

Kind of codeTemperature and alarms

The controller has seen a temperature outside the band it was set for and is saying so: a box above its alarm point, a fryer vat or an oven cavity that tripped its high-limit, or a dish machine rinse that never came up to heat. Often the cause sits outside the unit, such as a door left open during a delivery, a coil packed with grease, a kitchen far hotter than the maker allows or a booster fed cold water. Checking the door, the coil and the air around the unit is fair; move the product if a cold box stays above 41°F, and book the visit.

Usually leads toReach-in and prep table repair

Reach-ins, pass-throughs, prep tables and blast chillers: gaskets, hinges, fans, thermostats, condensers and compressors.

Shows up asCommercial Appliance Error Code on a Combi, Fryer, Dish Machine or Laundry Display

A commercial appliance error code appears as letters or numbers on a combi, fryer, reach-in controller, dish machine or laundry machine display, or as a flashing light or an alarm tone.

MakeTraulsen

A Traulsen cabinet that starts to drift gets its visit as soon as the food inside has a safe place to go.

SourceTraulsen All Series quick reference guide, owner's manual TR35924 rev. C (2015), linked from traulsen.com owner's manuals

Shown by the control on R & A Series cabinets, as listed in Traulsen's quick reference guide TR35924 (rev. C, 2015). Units built after July 2025 carry the Smart Control, which keeps alarms in a menu instead (see PFA).

Before you book,
in this order.

Each step comes from Traulsen's own guidance for CLO on its commercial appliances. Follow it to the end: the last card says whether this is a visit.

01

Ask whether frozen product was loaded recently and give the cabinet time to recover.

02

Check the set point on the control against the temperature your menu needs.

03

Move items that are freezing to a shelf away from the air outlet.

04

If CLO comes back with a normal load and set point, book a visit.

Still there?

It usually turns into reach-in and prep table repair. Book with the code and the model number.

What not to do

CLO does not point at a failing compressor. A control that cannot switch the compressor off, or a probe reading wrong, can both cause it, and both need a meter.

What you may
notice with it.

The commercial appliance problems CLO tends to arrive with. Answer these at the commercial appliance before anyone is booked.

All problems

Before you call

Commercial Appliance Error Code on a Combi, Fryer, Dish Machine or Laundry Display

All 8 causes, cheapest first

It also comes with

Close view of the dark touch control panel on the front of a stainless combi oven in a commercial kitchen, one abstract amber warning indicator glowing among unlit icons, the steam-fogged glass door blurred beside it. Problem

Commercial Appliance Error Code on a Combi, Fryer, Dish Machine or Laundry Display

8 causes, cheapest first

Where CLO usually leads

Reach-in and prep table repair.

Reach-in, pass-through or prep table gasket, hinge, fan motor, thermostat or controller, defrost heater, leak repair or compressor · moderate.
Book a visit What the job involves

Traulsen
commercial appliances.

A Traulsen cabinet that starts to drift gets its visit as soon as the food inside has a safe place to go.

Traulsen commercial appliance repair

More Traulsen codes

ELE LOSDOR OPNCHICLN FILSN1SN2SN3DEF ERRRUN ERRPFA

Temperature and alarms on other makes

Alto-Shaam E13Beverage-Air HiBlodgett Cavity High Temp ErrorCleveland RESET lightContinental Refrigerator HIDelfield HiFrymaster E16Garland E04
All 70 codes of this kind
A row of three stainless steel reach-in cabinets with solid doors along the wall of a working restaurant kitchen, the reach-ins clearly the subject, one door open showing sheet pans of prepped vegetables on wire shelves, a walk-in cooler door with a clear strip curtain visible at the far end, a cook seen only from behind in a white jacket passing in the soft background, bright even kitchen light. Traulsen builds this

Commercial cold storage

Reach-in and pass-through cabinets, walk-in coolers and walk-in freezers, prep and sandwich tables, undercounter units and blast chillers that hold a kitchen's food at safe temperatures.

 A working restaurant cooking line under a stainless ventilation hood, two stainless gas fryers with baskets hanging above the oil, a flat griddle and a combi oven with a glass door beside them, the equipment clearly the subject, a cook seen only from behind and shoulders down at the far end of the line, warm kitchen light, small blue flames visible under the griddle. Traulsen builds this

Commercial cooking equipment

Fryers, griddles, charbroilers, restaurant ranges, convection and combi ovens, steamers, kettles, holding cabinets and toasters, on gas or electric, that make up the hot side of a kitchen line.

In Traulsen's own words

CLO: Indicates that the cabinet air temperature is too low.
Traulsen All Series quick reference guide, owner's manual TR35924 rev. C (2015), linked from traulsen.com owner's manuals Traulsen All Series quick reference guide, owner's manual TR35924 rev. C (2015), linked from traulsen.com owner's manuals

Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Shown by the control on R & A Series cabinets, as listed in Traulsen's quick reference guide TR35924 (rev. C, 2015). Units built after July 2025 carry the Smart Control, which keeps alarms in a menu instead (see PFA).

Traulsen CLO commercial appliance 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 restaurant team working a busy commercial kitchen line.
For the heart of your home.

Questions
about CLO.

Can I clear CLO myself?
Ask whether frozen product was loaded recently and give the cabinet time to recover. If it comes back, it needs a visit.
Why is my Traulsen cooler freezing produce and showing CLO?
The set point may be too low or the control may not be ending the cooling cycle. Check the set point first; if it looks right, book a visit.
Will CLO go away on its own on a Traulsen?
After a load of frozen product, yes. It clears when the air is back above the low alarm limit.
Can I adjust the Traulsen set point myself?
Traulsen describes a customer access code for the control's settings in its guide. If you are unsure, leave it for the technician so other settings are not changed by mistake.

Back to your everyday

Still showing CLO?

A booking with a code goes further when it has the code as shown, the model and serial from the data plate, and a word on whether the unit still holds temperature, heats, rinses or spins. With those three, the office can match the likely part to your unit the same day.

Schedule a repair Call (844) 571-4566
(844) 571-4566 Schedule a repair