--- title: "Hatco LO H2O: the display cabinet reservoir needs water" description: "What LO H2O means on Hatco LO H2O: the display cabinet reservoir needs waters, what to check before booking, and when it is not a failure at all." url: "https://commercialappliancerepair.center/error-codes/hatco-lo-h2o/" --- # Hatco LO H2O: the display cabinet reservoir needs water Humidified FSCDH display cabinets alternate LO H2O with the cabinet temperature until their six-quart reservoir is full. ## What LO H2O actually means. Humidified FSCDH display cabinets alternate LO H2O with the cabinet temperature until their six-quart reservoir is full. It is a fill prompt, and it doubles as the fill gauge: the manual tells you to stop pouring once LO H2O stops flashing. There is one twist worth knowing: the low water probe senses minerals, so pure distilled water can leave LO H2O flashing even when the reservoir is full. Hatco commercial appliance display · also shown as LO H2O, Lo H2o What to do when LO H2O shows on the commercial appliance ### Kind of code Water, fill and drain Water is not arriving, not reaching its level, not heating or not leaving on time. A dish machine may be short of fill because a supply valve is half closed or its line strainer is clogged, it may drain slowly through a scrap basket full of debris, or its booster may be too scaled to heat the rinse; a combi's steam generator may be scaled or its water treatment exhausted; a washer-extractor may time out on a slow drain. Opening the supply valve, cleaning strainers with the unit off and checking the drain line are fair; a pump, a fill valve, a heater or a leak near wiring is a visit. ### Usually leads to Dish machine repair Undercounter, door-type and conveyor dish machines: tank heaters, boosters, wash pumps, fill and drain valves. ### 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 Hatco Hatco equipment is often checked in the gap between breakfast and lunch, when the station it serves can do without it for a short while. ### Source Hatco Flav-R-Savor FSCD and FSCDH convected display cabinet installation and operating manual (Form FSCDM-1016) Flav-R-Savor FSCD and FSCDH convected display cabinets; only humidified models have the reservoir and show LO H2O. ## Before you book, in this order. Each step comes from Hatco's own guidance for LO H2O on its commercial appliances. Follow it to the end: the last card says whether this is a visit. 01 Fill the reservoir slowly through the water fill cup and stop the moment LO H2O stops flashing; overfilling creates a shock hazard. 02 If you use distilled water and LO H2O keeps flashing on a full reservoir, add one teaspoon of salt on the initial fill as the manual advises. 03 Do not use deionized water, which Hatco says shortens the life of the reservoir and heaters. 04 If LO H2O stays on with the reservoir full and salt added, book a visit for the low water protection system. ### Still there? It usually turns into [dish machine repair](https://commercialappliancerepair.center/services/dish-machine-repair/). Book with the code and the model number. ### What not to do LO H2O is a normal refill prompt, not a failure. It is also different from Lo on a non-humidified cabinet, which reports a cabinet below 70°F. ## What you may notice with it. The commercial appliance problems LO H2O 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 - [**Water on the Commercial Kitchen Floor Near Equipment and Outlets**](https://commercialappliancerepair.center/problems/commercial-water-on-the-floor/) Problem ### Commercial Appliance Error Code on a Combi, Fryer, Dish Machine or Laundry Display 8 causes, cheapest first Where LO H2O usually leads ## Dish machine repair. **Dish machine tank heater or booster element, thermostat, fill valve, float switch, drain valve, wash pump seal or motor, conveyor drive · moderate.** Book a visit [What the job involves](https://commercialappliancerepair.center/services/dish-machine-repair/) ## Hatco commercial appliances. Hatco equipment is often checked in the gap between breakfast and lunch, when the station it serves can do without it for a short while. [Hatco commercial appliance repair](https://commercialappliancerepair.center/brands/hatco/) More Hatco codes [E1](https://commercialappliancerepair.center/error-codes/hatco-e1/) [E2](https://commercialappliancerepair.center/error-codes/hatco-e2/) [Lo](https://commercialappliancerepair.center/error-codes/hatco-lo/) [Temperature Probe Error](https://commercialappliancerepair.center/error-codes/hatco-temperature-probe-error/) [Control Board Overtemp](https://commercialappliancerepair.center/error-codes/hatco-control-board-overtemp/) [Heating Error](https://commercialappliancerepair.center/error-codes/hatco-heating-error/) [Communication Error](https://commercialappliancerepair.center/error-codes/hatco-communication-error/) [Touch Panel Error](https://commercialappliancerepair.center/error-codes/hatco-touch-panel-error/) [Top Element Is Out](https://commercialappliancerepair.center/error-codes/hatco-top-element-is-out/) [Fan Is Stopped](https://commercialappliancerepair.center/error-codes/hatco-fan-is-stopped/) [Clean Fan Filters](https://commercialappliancerepair.center/error-codes/hatco-clean-fan-filters/) [Clean Right Product Sensor](https://commercialappliancerepair.center/error-codes/hatco-clean-right-product-sensor/) [All 15 Hatco codes](https://commercialappliancerepair.center/error-codes/#codes-hatco) Water, fill and drain on other makes [Alto-Shaam E01](https://commercialappliancerepair.center/error-codes/alto-shaam-e01/) [Blodgett Water Level Error](https://commercialappliancerepair.center/error-codes/blodgett-water-level-error/) [Cleveland LOW WATER light](https://commercialappliancerepair.center/error-codes/cleveland-low-water-light/) [Dexter F2](https://commercialappliancerepair.center/error-codes/dexter-f2/) [Frymaster E33](https://commercialappliancerepair.center/error-codes/frymaster-e33/) [Hobart 019](https://commercialappliancerepair.center/error-codes/hobart-019/) [Miele Professional F18](https://commercialappliancerepair.center/error-codes/miele-professional-f18/) [Pitco DRAINING TURN OFF](https://commercialappliancerepair.center/error-codes/pitco-draining-turn-off/) [All 47 codes of this kind](https://commercialappliancerepair.center/error-codes/#family-water) Hatco 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. Hatco 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. Hatco builds this ### Commercial dish machines Undercounter, door-type and conveyor dish machines with their booster heaters and chemical feeds, the warewashing station that washes and sanitizes every rack before it goes back on the line. ## In Hatco's own words > Stop filling when “LO H2O” stops flashing on display. [Hatco Flav-R-Savor FSCD and FSCDH convected display cabinet installation and operating manual (Form FSCDM-1016)](https://www.hatcocorp.com/cms/IOMANUALS/000000010825661-00000-20111213.PDF) [Hatco Flav-R-Savor FSCD and FSCDH convected display cabinet installation and operating manual (Form FSCDM-1016)](https://www.hatcocorp.com/cms/IOMANUALS/000000010825661-00000-20111213.PDF) [Hatco Flav-R-Savor FSCD and FSCDH convected display cabinet installation and operating manual (Form FSCDM-1016)](https://www.hatcocorp.com/cms/IOMANUALS/000000010825661-00000-20111213.PDF) Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Flav-R-Savor FSCD and FSCDH convected display cabinets; only humidified models have the reservoir and show LO H2O. ## Hatco LO H2O 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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Fill the reservoir slowly through the water fill cup and stop the moment LO H2O stops flashing; overfilling creates a shock hazard. If it comes back, it needs a visit. ### Why does LO H2O keep flashing on my Hatco cabinet when it is full? If you use distilled water, the low water probe may not sense it. Hatco suggests a teaspoon of salt on the first fill; if that does not help, the probe needs service. ### How much water does a Hatco FSCDH reservoir hold? The manual gives six quarts. Fill slowly and stop when the flashing ends rather than filling to the brim. ### Should I use tap or distilled water in a Hatco display cabinet? Hatco recommends distilled water to protect parts, warns against deionized water, and says tap water means regular cleaning and deliming of the reservoir. --- **[Read on the site: Hatco LO H2O: the display cabinet reservoir needs water](https://commercialappliancerepair.center/error-codes/hatco-lo-h2o/)** **[Book a visit with CommercialApplianceRepair.center](https://commercialappliancerepair.center/schedule/)**