Randell E01 to E04: a Danfoss sensor has failed
Randell's Danfoss controls can read up to four sensors, S1 to S4, and report each failure as E01 to E04.
Mon–Sat, 8am–8pm
- Sensors and probes
- Commercial controls and board repair
- Source: Randell
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What E01
actually means.
Randell's Danfoss controls can read up to four sensors, S1 to S4, and report each failure as E01 to E04. The manual lists the same action for all four: contact service. Which sensor sits where depends on the model, so the technician checks the wiring diagram at the end of the manual.
Randell commercial appliance display · also shown as E02, E03, E04
What to do when E01 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.
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 E01 on its commercial appliances. Follow it to the end: the last card says whether this is a visit.
Check food temperatures with a separate thermometer and log them.
Keep doors, drawers and rail covers closed to help the unit hold.
Book a visit and say exactly which E code shows.
Still there?
It usually turns into commercial controls and board repair. Book with the code and the model number.
What not to do
An E code is not a temperature alarm, but the control may no longer hold temperature well. It is also not caused by the door or the load.
What you may
notice with it.
The commercial appliance problems E01 tends to arrive with. Answer these at the commercial appliance before anyone is booked.
All problems
Where E01 usually leads
Commercial controls and board repair.
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 repairMore Randell codes
Sensors 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 Randell's own words
E01 S1 Sensor Failure
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 E01 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 E01.
Can I clear E01 myself?
Can I keep using a Randell with E01 on the display?
Why does my Randell show E02 after the rail was cleaned?
Where are the wiring diagrams for a Randell?
Back to your everyday
Still showing E01?
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.