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The open door of a cold stainless combi oven in a commercial kitchen, its empty racks in view and a thin core temperature probe hanging on its holder inside the cavity, nobody at the combi oven.

Garland E21: a heat sink or board sensor reads wrong

Garland's electronics carry their own temperature sensors.

(844) 571-4566

Mon–Sat, 8am–8pm

  • Sensors and probes
  • Commercial controls and board repair
  • Source: Garland

Book a visit

Three short steps, about a minute.

or call (844) 571-4566

What E21
actually means.

Garland's electronics carry their own temperature sensors. When one reports an error, or the board is overheated because the room is too hot, the unit switches off and shows E21, or eight short flashes after each long one. E24, E25 and E26 share this row.

Garland commercial appliance display · also shown as 8 short flashes after each long flash

What to do when E21 shows on the commercial appliance

Kind of codeSensors and probes

A probe is handing the controller a reading it cannot trust, or none at all: a box or coil sensor torn loose from its clip, a fryer probe coated in carbon from oil left too long between filterings, a combi core probe with a kinked cable, or a connector gone green from steam and cleaning chemicals. The unit then runs on, stops, or shuts the heat or the cooling off to protect itself. Letting it cool and restarting it as the manual describes is fair; a probe that still reads wrong sits behind a panel, and that is a visit.

Usually leads toCommercial controls and board repair

Controllers, touch panels, relays, contactors and interlocks tested, and replaced only when the evidence says so.

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.

MakeGarland

Garland equipment on a cooking line is usually looked at after close, when every burner is cold and the grates can come up without rushing a cook.

SourceGarland Induction Counter-Top Series dual base-line models GI-SH/DU/BA installation, operation and maintenance manual, part number 4532290 Rev 3

Garland counter-top induction cook-tops, woks and griddles (GI-SH/DU/BA, GI-BH/BA, GI-SH/BA, GI-SH/GR). Units with a digital display show the E number; units with only an indicator lamp show the flash count instead.

Before you book,
in this order.

Each step comes from Garland's own guidance for E21 on its commercial appliances. Follow it to the end: the last card says whether this is a visit.

01

Switch off and let the unit cool.

02

Clear the vents and clean the air filter.

03

Reduce the air temperature around the unit if you can.

04

Book a visit if E21 appears in normal room conditions, since a board sensor may need replacement.

Still there?

It usually turns into commercial controls and board repair. Book with the code and the model number.

What not to do

E21 is not about the cook zone or the pan; that is E04. It concerns the electronics, and it often clears once the air around the unit is cooler.

What you may
notice with it.

The commercial appliance problem E21 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
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 E21 usually leads

Commercial controls and board repair.

Controller, touch panel, probe or sensor, relay, contactor, power supply, door switch or interlock, tested before anything is changed · moderate.
Book a visit What the job involves

Garland
commercial appliances.

Garland equipment on a cooking line is usually looked at after close, when every burner is cold and the grates can come up without rushing a cook.

Garland commercial appliance repair

More Garland codes

E01E02E03E04E05E06E10E12E22E29E47

Sensors and probes on other makes

Alto-Shaam E20Beverage-Air E01Blodgett Cavity Probe ErrorContinental Refrigerator E0Delfield E01Dexter TEMP SENSOR SHORTFrymaster E13Hatco E1
All 61 codes of this kind
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. Garland 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 Garland's own words

Sensor error from heat sink or CPU.
Garland Induction Counter-Top Series dual base-line models GI-SH/DU/BA installation, operation and maintenance manual, part number 4532290 Rev 3 Garland Induction Counter-Top Series dual base-line models GI-SH/DU/BA installation, operation and maintenance manual, part number 4532290 Rev 3

Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Garland counter-top induction cook-tops, woks and griddles (GI-SH/DU/BA, GI-BH/BA, GI-SH/BA, GI-SH/GR). Units with a digital display show the E number; units with only an indicator lamp show the flash count instead.

Garland E21 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 E21.

Can I clear E21 myself?
Switch off and let the unit cool. If it comes back, it needs a visit.
Is E21 on a Garland a failed part?
Sometimes. If the unit shows E21 in a cool room with clean filters, a sensor on the board is the likely cause.
Why do E21 and E06 appear together on my Garland?
Both point to heat around the electronics. A hot room or blocked intake can trigger either.
Will E21 clear on its own?
Often after the unit cools. If it returns right after a restart, book a visit.

Back to your everyday

Still showing E21?

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