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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.

Randell CON: the condenser has hit its high temperature limit

The condenser on a Randell sidemount or FX unit sheds the heat pulled out of the cabinet.

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Mon–Sat, 8am–8pm

  • Compressor and cooling
  • Walk-in cooler repair
  • Source: Randell

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Three short steps, about a minute.

or call (844) 571-4566

What CON
actually means.

The condenser on a Randell sidemount or FX unit sheds the heat pulled out of the cabinet. When it runs too hot, the Danfoss control shows CON. Randell's table lists three actions: clean the coil, look for anything blocking airflow, then contact service.

Randell commercial appliance display · also shown as Con

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.

MakeRandell

Randell prep stations that lose temperature over the afternoon are usually visited just before the dinner setup, when the rail can be cleared.

SourceRandell 9200-290 sidemount series operator manual, PP MNL2501 rev. B (12/25)

Listed in the Danfoss controller codes table of Randell's 9200-290 sidemount operator manual (rev. B, 12/25).

Before you book,
in this order.

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

01

Switch the unit off, then brush or vacuum the condenser coil in the direction of the fins.

02

Remove boxes, towels or anything else blocking the vents around the condensing unit.

03

Restore power and watch whether CON clears.

04

If CON returns or the coil is greasy, 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 and not a compressor failure, though ignoring it shortens the compressor's life. Randell calls condenser coils critical to the life of the compressor.

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

Randell
commercial appliances.

Randell prep stations that lose temperature over the afternoon are usually visited just before the dinner setup, when the rail can be cleared.

Randell commercial appliance repair

More Randell codes

HiLoLEAuLiuHiE01dor

Compressor and cooling on other makes

Beverage-Air LEADelfield LEAHoshizaki E3Traulsen CLN FILTrue Residential ConTurbo 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. Randell 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. Randell 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 Randell's own words

Condenser Temperature High Limit
Randell 9200-290 sidemount series operator manual, PP MNL2501 rev. B (12/25) Randell 9200-290 sidemount series operator manual, PP MNL2501 rev. B (12/25)

Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Listed in the Danfoss controller codes table of Randell's 9200-290 sidemount operator manual (rev. B, 12/25).

Randell 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?
Switch the unit off, then brush or vacuum the condenser coil in the direction of the fins. If it comes back, it needs a visit.
How do I clean the condenser on a Randell?
Randell recommends coil cleaner and/or a vacuum and brush, brushing in the direction of the fins. Leave greasy coils to a technician.
Why does my Randell show CON next to the fryers?
Hot, greasy air around the unit heats and coats the condenser. Keep the area around the vents clear and clean the coil more often.
Can I keep using a Randell with CON on the display?
For a short time, if food temperatures hold. Clean the coil as soon as you can.

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