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A commercial condensing unit mounted on top of a walk-in cooler in a restaurant back room, its condenser fan guard and dusty coil face in view, insulated copper lines running down into the walk-in cooler's roof panel, nobody near the unit.

True Con: the Danfoss control flags the condenser

True lists Con as the condenser alarm on its Danfoss ERC controls.

(844) 571-4566

Mon–Sat, 8am–8pm

  • Compressor and cooling
  • Walk-in cooler repair
  • Source: True Residential

Book a visit

Three short steps, about a minute.

or call (844) 571-4566

What Con
actually means.

True lists Con as the condenser alarm on its Danfoss ERC controls. The condenser is the coil that sheds heat, usually behind the front grille or under the unit, and dust or grease on it is the most common reason it runs hot. True's own guide ties a dirty condenser to frozen evaporator coils and to system failure.

True Residential commercial appliance display

What to do when Con shows on the commercial appliance

Kind of codeCompressor and cooling

The unit is running but not moving heat out of the box the way it should. On a walk-in that is often a condensing unit on the roof choking on cottonwood or grease, a condenser fan that stopped, an evaporator fan or defrost heater that failed so the coil iced solid, or a slow refrigerant leak; a reach-in adds a door gasket or heater that lets warm air in. Cleaning the condenser face with the power off and checking that the doors close are fair first steps; the refrigerant circuit, the compressor and every line stay with a technician.

Usually leads toWalk-in cooler repair

Walk-in coolers and freezers back to temperature: evaporators, fans, defrost, drain heaters, condensing units and doors.

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.

MakeTrue Residential

A True cooler or prep station in a restaurant is looked at once the kitchen confirms where the held food is sitting for now.

SourceTrue Commercial Refrigeration General Control Guide, P#811072, rev. C (09/2025)

Listed for Danfoss ERC controls in True's general control guide (rev. C, 2025). The no-display Danfoss version signals the same alarm as one flash then three flashes of its LED.

Before you book,
in this order.

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

01

Unplug the unit, then look at the condenser fins for a mat of dust or grease.

02

Brush or vacuum loose dust off the fins in the direction they run; leave greasy coils to a technician.

03

Clear boxes and bags away from the grille so air can move, then plug the unit back in.

04

If Con returns within a day or two of cleaning, book a visit.

Still there?

It usually turns into walk-in cooler repair. Book with the code and the model number.

What not to do

Con is not a refrigerant leak alarm; that is LEA. It also does not mean the compressor has failed, although a condenser left dirty long enough shortens its life.

What you may
notice with it.

The commercial appliance problems Con 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 Con usually leads

Walk-in cooler repair.

Walk-in evaporator fan, defrost heater or drain line heater, door gasket, frame heater, expansion valve, leak repair, compressor or condensing unit · moderate to highest.
Book a visit What the job involves

True Residential
commercial appliances.

A True cooler or prep station in a restaurant is looked at once the kitchen confirms where the held food is sitting for now.

True Residential commercial appliance repair

More True Residential codes

HILOdOrdEFHAP1P2E01LEAuLiEoCEE
All 14 True Residential codes

Compressor and cooling on other makes

Beverage-Air LEADelfield LEAHoshizaki E3Randell CONTraulsen CLN FILTurbo Air C1Victory CHt
All 15 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. True Residential 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. True Residential 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 True Residential's own words

Con Condenser alarm
True Commercial Refrigeration General Control Guide, P#811072, rev. C (09/2025) True Commercial Refrigeration General Control Guide, P#811072, rev. C (09/2025)

Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Listed for Danfoss ERC controls in True's general control guide (rev. C, 2025). The no-display Danfoss version signals the same alarm as one flash then three flashes of its LED.

True Residential Con 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 Con.

Can I clear Con myself?
Unplug the unit, then look at the condenser fins for a mat of dust or grease. If it comes back, it needs a visit.
How often should the condenser on a True be cleaned?
True points to its installation manual for the schedule. In a kitchen with fryers or flour in the air, monthly checks are sensible.
Why does my True show Con in summer only?
A hot kitchen and a partly dirty coil together push the condenser past its limit. Cleaning the coil and giving the unit room to breathe usually cures a seasonal Con.
Can I keep using a True with Con on the display?
Usually yes for a short time, but watch the food temperature. A condenser that cannot shed heat makes the cabinet warm and works the compressor hard.

Back to your everyday

Still showing Con?

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