--- title: "Beverage-Air E01 to E04: a sensor is unplugged or has failed" description: "What E01 means on Beverage-Air E01 to E04: a sensor is unplugged or has faileds, what to check before booking, and when it is not a failure at all." url: "https://commercialappliancerepair.center/error-codes/beverage-air-e01/" --- # Beverage-Air E01 to E04: a sensor is unplugged or has failed Beverage-Air controls can read up to four sensors, S1 to S4. ## What E01 actually means. Beverage-Air controls can read up to four sensors, S1 to S4. Its message table groups E01 to E04 under one explanation, a sensor unplugged or failed, and one action: service. The Cross Temp alarm table adds that each code covers a short or an open circuit on its sensor. Beverage-Air commercial appliance display · also shown as E02, E03, E04 What to do when E01 shows on the commercial appliance ### Kind of code Sensors 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 to Commercial controls and board repair Controllers, touch panels, relays, contactors and interlocks tested, and replaced only when the evidence says so. ### Shows up as Commercial 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. ### Make Beverage-Air When a Beverage-Air cabinet drifts warm mid-shift, the first minutes of the visit go to where the food went and what the temperature log recorded. ### Source Beverage-Air Horizon Series HR reach-in user manual, 809-144A Listed in the 'message displayed' table of Beverage-Air's Horizon HR reach-in, SPE prep table and Cross Temp manuals (2026 editions). ## Before you book, in this order. Each step comes from Beverage-Air's own guidance for E01 on its commercial appliances. Follow it to the end: the last card says whether this is a visit. 01 Check food temperatures with a separate thermometer; the display may be wrong. 02 Keep doors closed to help the cabinet hold. 03 Book a visit and give the exact E number. ### Still there? It usually turns into [commercial controls and board repair](https://commercialappliancerepair.center/services/commercial-controls-and-board-repair/). Book with the code and the model number. ### What not to do An E code is not a warm alarm by itself. It is also not caused by loading or by the door. ## 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](https://commercialappliancerepair.center/problems/) Before you call ### [Commercial Appliance Error Code on a Combi, Fryer, Dish Machine or Laundry Display](https://commercialappliancerepair.center/problems/commercial-error-code/) [All 8 causes, cheapest first](https://commercialappliancerepair.center/problems/commercial-error-code/) It also comes with - [**Reach-In Cooler Not Holding Temperature Through a Shift**](https://commercialappliancerepair.center/problems/reach-in-not-holding-temperature/) - [**Prep Table Running Warm in the Top Rail and the Base**](https://commercialappliancerepair.center/problems/prep-table-running-warm/) Problem ### Commercial Appliance Error Code on a Combi, Fryer, Dish Machine or Laundry Display 8 causes, cheapest first Where E01 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](https://commercialappliancerepair.center/services/commercial-controls-and-board-repair/) ## Beverage-Air commercial appliances. When a Beverage-Air cabinet drifts warm mid-shift, the first minutes of the visit go to where the food went and what the temperature log recorded. [Beverage-Air commercial appliance repair](https://commercialappliancerepair.center/brands/beverage-air/) More Beverage-Air codes [dEF](https://commercialappliancerepair.center/error-codes/beverage-air-def/) [Hi](https://commercialappliancerepair.center/error-codes/beverage-air-hi/) [Lo](https://commercialappliancerepair.center/error-codes/beverage-air-lo/) [dOr](https://commercialappliancerepair.center/error-codes/beverage-air-dor/) [LEA](https://commercialappliancerepair.center/error-codes/beverage-air-lea/) [Con](https://commercialappliancerepair.center/error-codes/beverage-air-con/) [uLi](https://commercialappliancerepair.center/error-codes/beverage-air-uli/) [uHi](https://commercialappliancerepair.center/error-codes/beverage-air-uhi/) Sensors and probes on other makes [Alto-Shaam E20](https://commercialappliancerepair.center/error-codes/alto-shaam-e20/) [Blodgett Cavity Probe Error](https://commercialappliancerepair.center/error-codes/blodgett-cavity-probe-error/) [Continental Refrigerator E0](https://commercialappliancerepair.center/error-codes/continental-refrigerator-e0/) [Delfield E01](https://commercialappliancerepair.center/error-codes/delfield-e01/) [Dexter TEMP SENSOR SHORT](https://commercialappliancerepair.center/error-codes/dexter-temp-sensor-short/) [Frymaster E13](https://commercialappliancerepair.center/error-codes/frymaster-e13/) [Garland E21](https://commercialappliancerepair.center/error-codes/garland-e21/) [Hatco E1](https://commercialappliancerepair.center/error-codes/hatco-e1/) [All 62 codes of this kind](https://commercialappliancerepair.center/error-codes/#family-sensor) Beverage-Air 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. ## In Beverage-Air's own words > E01, E02, E03, E04 Sensor unplugged or has failed Call for service. [Beverage-Air Horizon Series HR reach-in user manual, 809-144A](https://beverage-air.com/content/manuals/809-144A_MANUAL_INSTALLATION_AND_OPERATION_BEV_AIR_HR.pdf) [Beverage-Air SPE sandwich prep table user manual, 809-168A (rev. 03/26)](https://beverage-air.com/content/manuals/809-168A_MANUAL_INSTALLATION_AND_OPERATION_BEV_AIR_SPE.pdf) Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Listed in the 'message displayed' table of Beverage-Air's Horizon HR reach-in, SPE prep table and Cross Temp manuals (2026 editions). ## Beverage-Air 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. 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Check food temperatures with a separate thermometer; the display may be wrong. If it comes back, it needs a visit. ### Can a Beverage-Air keep cooling with E01? It may, but the reading it relies on is gone. Check the food with your own thermometer. ### Why did E02 appear after cleaning my Beverage-Air? Beverage-Air's own wording says unplugged or failed; a connector pulled during cleaning is a common cause. ### Which sensor is E01 on a Beverage-Air? It is sensor S1 on the control. Where S1 sits depends on the model, which the technician checks on the wiring diagram. --- **[Read on the site: Beverage-Air E01 to E04: a sensor is unplugged or has failed](https://commercialappliancerepair.center/error-codes/beverage-air-e01/)** **[Book a visit with CommercialApplianceRepair.center](https://commercialappliancerepair.center/schedule/)**