--- title: "True LO: the cabinet has dropped below its low alarm limit" description: "What LO means on True LO: the cabinet has dropped below its low alarm limits, what to check before booking, and when it is not a failure at all." url: "https://commercialappliancerepair.center/error-codes/true-lo/" --- # True LO: the cabinet has dropped below its low alarm limit On Carel and Danfoss controls fitted by True, LO or Lo is the low temperature alarm. ## What LO actually means. On Carel and Danfoss controls fitted by True, LO or Lo is the low temperature alarm. The return-air probe reads colder than the low limit stored in the control. In a cooler that can mean lettuce, dairy and sauces start to freeze near the coil. True Residential commercial appliance display · also shown as Lo What to do when LO shows on the commercial appliance ### Kind of code Temperature and alarms The controller has seen a temperature outside the band it was set for and is saying so: a box above its alarm point, a fryer vat or an oven cavity that tripped its high-limit, or a dish machine rinse that never came up to heat. Often the cause sits outside the unit, such as a door left open during a delivery, a coil packed with grease, a kitchen far hotter than the maker allows or a booster fed cold water. Checking the door, the coil and the air around the unit is fair; move the product if a cold box stays above 41°F, and book the visit. ### Usually leads to Reach-in and prep table repair Reach-ins, pass-throughs, prep tables and blast chillers: gaskets, hinges, fans, thermostats, condensers and compressors. ### 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 True Residential A True cooler or prep station in a restaurant is looked at once the kitchen confirms where the held food is sitting for now. ### Source True Commercial Refrigeration General Control Guide, P#811072, rev. C (09/2025) Printed as LO for Carel and Lo for Danfoss ERC, Danfoss ETC and LAE controls in True's general control guide (rev. C, 2025). ## Before you book, in this order. Each step comes from True Residential's own guidance for LO on its commercial appliances. Follow it to the end: the last card says whether this is a visit. 01 Look at the set point on the display and compare it with the temperature your menu needs. 02 Check product near the air outlet for ice crystals and move anything that is freezing to a shelf farther from the coil. 03 Note whether a large load of frozen product went in recently; that can pull the cabinet down for a while. 04 If LO returns with a normal set point and no frozen load, book a visit. ### Still there? It usually turns into [reach-in and prep table repair](https://commercialappliancerepair.center/services/reach-in-and-prep-table-repair/). Book with the code and the model number. ### What not to do LO is not a sign the cooling system is weak; it is the opposite problem. On a Dixell control the same kind of alarm reads LA, and on LAE controls it reads Lo. ## What you may notice with it. The commercial appliance problems LO 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/) Problem ### Commercial Appliance Error Code on a Combi, Fryer, Dish Machine or Laundry Display 8 causes, cheapest first Where LO usually leads ## Reach-in and prep table repair. **Reach-in, pass-through or prep table gasket, hinge, fan motor, thermostat or controller, defrost heater, leak repair or compressor · moderate.** Book a visit [What the job involves](https://commercialappliancerepair.center/services/reach-in-and-prep-table-repair/) ## True Residential commercial appliances. A True cooler or prep station in a restaurant is looked at once the kitchen confirms where the held food is sitting for now. [True Residential commercial appliance repair](https://commercialappliancerepair.center/brands/true/) More True Residential codes [HI](https://commercialappliancerepair.center/error-codes/true-hi/) [dOr](https://commercialappliancerepair.center/error-codes/true-dor/) [dEF](https://commercialappliancerepair.center/error-codes/true-def/) [HA](https://commercialappliancerepair.center/error-codes/true-ha/) [P1](https://commercialappliancerepair.center/error-codes/true-p1/) [P2](https://commercialappliancerepair.center/error-codes/true-p2/) [E01](https://commercialappliancerepair.center/error-codes/true-e01/) [Con](https://commercialappliancerepair.center/error-codes/true-con/) [LEA](https://commercialappliancerepair.center/error-codes/true-lea/) [uLi](https://commercialappliancerepair.center/error-codes/true-uli/) [EoC](https://commercialappliancerepair.center/error-codes/true-eoc/) [EE](https://commercialappliancerepair.center/error-codes/true-ee/) [All 14 True Residential codes](https://commercialappliancerepair.center/error-codes/#codes-true) Temperature and alarms on other makes [Alto-Shaam E13](https://commercialappliancerepair.center/error-codes/alto-shaam-e13/) [Beverage-Air Hi](https://commercialappliancerepair.center/error-codes/beverage-air-hi/) [Blodgett Cavity High Temp Error](https://commercialappliancerepair.center/error-codes/blodgett-cavity-high-temp-error/) [Cleveland RESET light](https://commercialappliancerepair.center/error-codes/cleveland-reset-light/) [Continental Refrigerator HI](https://commercialappliancerepair.center/error-codes/continental-refrigerator-hi/) [Delfield Hi](https://commercialappliancerepair.center/error-codes/delfield-hi/) [Frymaster E16](https://commercialappliancerepair.center/error-codes/frymaster-e16/) [Garland E04](https://commercialappliancerepair.center/error-codes/garland-e04/) [All 69 codes of this kind](https://commercialappliancerepair.center/error-codes/#family-temperature) True Residential 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. True Residential 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 True Residential's own words > LO Low temperature alarm [True Commercial Refrigeration General Control Guide, P#811072, rev. C (09/2025)](https://www.truemfg.com/wp-content/uploads/2025/09/811072_Commercial-Refrigeration-General-Control-Guide_REV_C_EN.pdf) [True Commercial Refrigeration General Control Guide, P#811072, rev. C (09/2025)](https://www.truemfg.com/wp-content/uploads/2025/09/811072_Commercial-Refrigeration-General-Control-Guide_REV_C_EN.pdf) Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Printed as LO for Carel and Lo for Danfoss ERC, Danfoss ETC and LAE controls in True's general control guide (rev. C, 2025). ## True Residential LO 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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Look at the set point on the display and compare it with the temperature your menu needs. If it comes back, it needs a visit. ### Why is my True cooler showing LO when the set point looks right? The probe may be reading colder air than the rest of the box, or the control may not be switching the compressor off in time. Both need a meter and a second thermometer, so book a visit if it keeps happening. ### Can a cold kitchen cause LO on a True? A very cold room can slow the cabinet's own warming between cycles, and a unit placed near an open back door in winter sees that. Move it or shield it if you can and watch whether LO stops. ### Will LO hurt the food in my True cabinet? Produce and dairy can freeze and lose quality even though they stay safe. Check the items nearest the coil first. --- **[Read on the site: True LO: the cabinet has dropped below its low alarm limit](https://commercialappliancerepair.center/error-codes/true-lo/)** **[Book a visit with CommercialApplianceRepair.center](https://commercialappliancerepair.center/schedule/)**