Alto-Shaam E21: the cabinet temperature probe has failed
The N6 probe tells the CTP how hot the cooking cabinet is.
Mon–Sat, 8am–8pm
- Sensors and probes
- Commercial controls and board repair
- Source: Alto-Shaam
Book a visit
Three short steps, about a minute.
or call (844) 571-4566
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What E21
actually means.
The N6 probe tells the CTP how hot the cooking cabinet is. E21 is called out when that probe is malfunctioning or disconnected. Without it the CTP has no idea how hot its cabinet is.
Alto-Shaam commercial appliance display
What to do when E21 shows on the commercial applianceKind 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.
MakeAlto-Shaam
An Alto-Shaam call is usually booked for the hours between the last plate and the prep crew, so the cabinet can cool and the tech can open it without holding up service.
SourceAlto-Shaam Combitherm CT PROformance Series operator's manual, MN-35948 Rev 21 (10/21) (Wayback copy)
Combitherm CT PROformance (CTP) combi ovens, error code table in operator's manual MN-35948 Rev 21.
Before you book,
in this order.
Each step comes from Alto-Shaam's own guidance for E21 on its commercial appliances. Follow it to the end: the last card says whether this is a visit.
Acknowledge E21 with Start and take the food out.
Finish the batch in another oven.
Book a visit; the probe and its wiring sit behind panels that stay closed for anyone but a technician.
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 the food probe, which reports as E20 or E22. When the same probe shorts to ground instead of opening, the oven reports E43.
What you may
notice with it.
The commercial appliance problems E21 tends to arrive with. Answer these at the commercial appliance before anyone is booked.
All problems
Where E21 usually leads
Commercial controls and board repair.
Alto-Shaam
commercial appliances.
An Alto-Shaam call is usually booked for the hours between the last plate and the prep crew, so the cabinet can cool and the tech can open it without holding up service.
Alto-Shaam commercial appliance repairMore Alto-Shaam codes
All 15 Alto-Shaam codesSensors and probes on other makes
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.
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 Alto-Shaam's own words
N6 oven cavity temperature probe wires disconnected.
Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Combitherm CT PROformance (CTP) combi ovens, error code table in operator's manual MN-35948 Rev 21.
Alto-Shaam 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 areasTampa BayFL · 31 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
Questions
about E21.
Can I clear E21 myself?
Can I cook with E21 on an Alto-Shaam combi?
What is N6 on an Alto-Shaam CTP?
Is E21 different from E43 on an Alto-Shaam?
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.