--- title: "Commercial Appliance Error Code on a Combi, Fryer, Dish Machine or Laundry Display: Causes and Fixes" description: "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…" url: "https://commercialappliancerepair.center/problems/commercial-error-code/" --- # 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. ## What it usually means. Commercial equipment with electronic controls watches itself constantly, and when something is out of line it reports it with a code. Combi ovens report water levels, steam generators, fans and probes; fryers report heat-up time, ignition and probe readings; reach-in and walk-in controllers report temperatures, defrost and sensor problems; dish machines report fill, drain and heating; laundry machines report door locks, drain, balance and drive issues. Rational, Alto-Shaam, Frymaster, Pitco, Henny Penny, Hobart, Traulsen, True, Speed Queen, UniMac, Huebsch and Dexter each publish their own lists, and the same number means something different from one make to the next, so the make and the model come first. Not every code is a failure. Delime prompts, clean cycles, defrost, energy saving and temperature alarms that clear themselves are modes. Many real codes follow the day: a door left ajar, a filter overdue, a water supply half closed, a power dip during a storm. On this site, codes are grouped into eight families by what they report: modes, temperature and alarms, sensors and probes, compressor and cooling, ignition and gas, water, fill and drain, motors and drives, and controls and power. The 8 causes, cheapest first Answer these first 01 What exactly does the display show, and is the light steady or flashing? 02 Which appliance is it, and what make, model and serial are on its data plate? 03 Did the code appear at startup, in the middle of a cycle or at the end? 04 Was there a power dip, a door left open, a filter overdue or a water valve closed before it? 05 Does the code clear after a restart, and how soon does it return? ## Check these before you book. Commercial appliance error code: 5 checks, and none of them costs anything. 01 Photograph the display, or film a flashing light for a few seconds, before you switch anything off. 02 Look the code up for your make on this site, or in the manual for that exact model. 03 Check whether it is a mode: defrost, clean, delime and energy save each end on their own terms. ### Also worth checking - Switch the unit off at its control, wait a minute, restart it and note how soon the code comes back. - Keep the panels closed and the gas, water and refrigerant connections alone; when a code returns, book with the photo. ### How soon does it need a visit? Most codes on their own do not need a same-day visit. Five situations come first, with their own pages: a gas smell, a fryer or grease fire, a warm walk-in with food inside, water on the floor near power, and a burning smell. ## The causes, cheapest first. 8 things commercial appliance error code on a combi, fryer, dish machine or laundry display turns out to be, from mode, not a failure to controls and power. [The cost guide](https://commercialappliancerepair.center/cost/) 1. 01 no repair ### Mode, not a failure Defrost, clean cycle, delime, energy save and some self-clearing temperature alarms show codes of their own. The manual for the model says how each one ends. No repair: check it yourself 2. 02 low ### Temperature and alarms A cabinet above its set point, an oven that cannot reach its temperature or a dish tank running cool sets an alarm code. [Fixed by reach-in and prep table repair](https://commercialappliancerepair.center/services/reach-in-and-prep-table-repair/) [See reach-in cooler not holding temperature through a shift](https://commercialappliancerepair.center/problems/reach-in-not-holding-temperature/) 3. 03 low ### Sensors and probes A probe that reads open, shorted or out of range stops the controller from trusting its readings. [Fixed by commercial controls and board repair](https://commercialappliancerepair.center/services/commercial-controls-and-board-repair/) [See commercial fryer not heating or slow to recover between baskets](https://commercialappliancerepair.center/problems/commercial-fryer-not-heating/) 4. 04 low to moderate ### Ignition and gas A burner that does not light within its time, or a flame that is lost during a cycle, sets an ignition code on gas equipment. [Fixed by commercial cooking line gas repair](https://commercialappliancerepair.center/services/commercial-cooking-line-gas-repair/) [See pilot won't stay lit on a fryer, griddle or steamer on the line](https://commercialappliancerepair.center/problems/commercial-pilot-wont-stay-lit/) 5. 05 low to moderate ### Water, fill and drain A tank that does not fill in time, a drain that does not empty, or a steam generator short of water sets a water code. [Fixed by commercial oven and combi oven repair](https://commercialappliancerepair.center/services/commercial-oven-and-combi-repair/) [See combi oven steam problem: weak steam, scale or a dry cavity](https://commercialappliancerepair.center/problems/combi-oven-steam-problem/) 6. 06 moderate ### Compressor and cooling High head pressure, a compressor that will not start or a coil that stays iced set a cooling code on cold storage. [Fixed by walk-in cooler repair](https://commercialappliancerepair.center/services/walk-in-cooler-repair/) [See walk-in cooler warm above 41°f with food inside](https://commercialappliancerepair.center/problems/walk-in-cooler-warm/) 7. 07 moderate ### Motors and drives A fan motor that stalls, a drum drive that trips or a door lock that does not prove closed sets a motor code. [Fixed by commercial laundry machine repair](https://commercialappliancerepair.center/services/commercial-laundry-machine-repair/) [See commercial laundry machine not spinning: loads left soaking wet](https://commercialappliancerepair.center/problems/commercial-laundry-machine-not-spinning/) 8. 08 moderate ### Controls and power A board that fails its self-test, a supply voltage out of range or a display that loses communication sets a control code. [Fixed by commercial controls and board repair](https://commercialappliancerepair.center/services/commercial-controls-and-board-repair/) [See restaurant equipment burning smell: scorched oil, hot wiring or lint](https://commercialappliancerepair.center/problems/commercial-burning-smell/) 9. What it costs ### Every repair on the site's cost scale, side by side Open the cost guide ## What else it could be. Most often confused with commercial fryer not heating or slow to recover between baskets, then combi oven steam problem: weak steam, scale or a dry cavity. [All problems](https://commercialappliancerepair.center/problems/) Codes that come with it - [`E01` Alto-Shaam · Water, fill and drain](https://commercialappliancerepair.center/error-codes/alto-shaam-e01/) - [`E02` Alto-Shaam · Controls and power](https://commercialappliancerepair.center/error-codes/alto-shaam-e02/) - [`E03` Alto-Shaam · Motors and drives](https://commercialappliancerepair.center/error-codes/alto-shaam-e03/) - [`E13` Alto-Shaam · Temperature and alarms](https://commercialappliancerepair.center/error-codes/alto-shaam-e13/) - [`E20` Alto-Shaam · Sensors and probes](https://commercialappliancerepair.center/error-codes/alto-shaam-e20/) - [`E21` Alto-Shaam · Sensors and probes](https://commercialappliancerepair.center/error-codes/alto-shaam-e21/) [328 more codes, by make](https://commercialappliancerepair.center/error-codes/) Also related - [**Commercial Laundry Machine Not Spinning: Loads Left Soaking Wet** 6 causes](https://commercialappliancerepair.center/problems/commercial-laundry-machine-not-spinning/) ### Commercial Fryer Not Heating or Slow to Recover Between Baskets 6 causes ### Combi Oven Steam Problem: Weak Steam, Scale or a Dry Cavity 6 causes ### Reach-In Cooler Not Holding Temperature Through a Shift 6 causes ## The makes it happens on. 35 makes on this site; commercial appliance error code on a combi, fryer, dish machine or laundry display can show up on any of them. Each mark opens that make's own page. [All 35 brands](https://commercialappliancerepair.center/brands/) ## Commercial Appliance Error Code on a Combi, Fryer, Dish Machine or Laundry Display, where we come out. 9 metros, each with its own page. 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Does it have to be done right away? Most combis let you finish the service and delime afterward, as the manual describes. Leaving it for weeks, though, is what scales the generator. ### Can one make's error code be read with another make's manual? No. The same code means different things on different makes. The make, the model and the controller version decide it. ### The reach-in controller shows a probe code but the cabinet feels cold. Is it urgent? Probe the food and log it. If it holds 41°F or below, book a visit within a day or two; the controller may be running on a backup schedule. ### The laundry machine shows a door code. What is worth checking first? That the door closes fully and nothing is caught in the seal. If the code returns with a closed door, the lock is checked on a visit. --- **[Read on the site: Commercial Appliance Error Code on a Combi, Fryer, Dish Machine or Laundry Display: Causes and Fixes](https://commercialappliancerepair.center/problems/commercial-error-code/)** **[Book a visit with CommercialApplianceRepair.center](https://commercialappliancerepair.center/schedule/)**