--- title: "Sub-Zero ice machine with the blue ICE light flashing: automatic shut-off" description: "What ICE flashing means on Sub-Zero ice machine with the blue ICE light flashing: automatic shut-offs, what to check before booking, and when it is not a…" url: "https://icemachinerepair.center/error-codes/sub-zero-ice-flashing/" --- # Sub-Zero ice machine with the blue ICE light flashing: automatic shut-off The UC-15I stops itself after two freeze and harvest cycles in a row that each reach the 55-minute maximum, or after about 120 cycles, roughly two days, that never satisfy the bin. ## What ICE flashing actually means. The UC-15I stops itself after two freeze and harvest cycles in a row that each reach the 55-minute maximum, or after about 120 cycles, roughly two days, that never satisfy the bin. The steady blue ICE light then flashes. Sub-Zero's own steps start with the water, because a machine that gets too little water cannot finish a cycle. Sub-Zero ice machine display · also shown as ICE light flashing blue, blinking ICE LED What to do when ICE flashing shows on the ice machine ### Kind of code Harvest and freeze cycle A freeze ran longer than the board allows, or a harvest started and the ice never fell. Scale on the evaporator holds the sheet to the plate, a thickness probe crusted with minerals never signals, a hot gas valve that does not open leaves the plate cold, a harvest assist that does not push, or a water curtain that swings without tripping its switch all end in this family. A cleaning cycle run by the manual often clears it; a valve or a probe is a technician's job. ### Usually leads to Ice machine harvest repair The hot gas valve, harvest assist, curtain switch and thickness probe that decide when a sheet of cubes is done and make it drop. ### Shows up as Ice Machine Error Code or Flashing Light: What It Is Telling You An ice machine error code may show as a number on a small display, a pattern of blinking lights on the control board, a colored light on the front, or a machine that stops with one indicator flashing. ### Make Sub-Zero Sub-Zero ice machine calls in a home check the drain route and the water line with the same care as the ice itself. ### Source Sub-Zero answer: UC-15I not running with ICE indicator flashing Sub-Zero UC-15I and UC-15IP, indoor and outdoor, with the POWER, ICE, DELAY, CLEAN and REPLACE FILTER touch panel. The Designer DEU1550I guide could not be read, so it is not covered. ## Before you book, in this order. Each step comes from Sub-Zero's own guidance for ICE flashing on its ice machines. Follow it to the end: the last card says whether this is a visit. 01 Find the water shut-off for the ice machine, behind the kickplate, in a nearby cabinet or in the basement, and make sure it is fully open. 02 After the water is back on, allow up to an hour for the first harvest; Sub-Zero expects one or two batches in that time. 03 With a filter installed, remove it for a trial run; more water gets through without it, and if ice returns the filter was the problem. 04 If the machine still makes no ice, book a visit. ### Still there? It usually turns into [ice machine harvest repair](https://icemachinerepair.center/services/ice-machine-harvest-repair/). Book with the code and the model number. ### What not to do A steady blue ICE light is normal and simply means the machine is making ice. The flashing CLEAN light belongs to the cleaning cycle and has nothing to do with this shut-off. ## What you may notice with it. The ice machine problems ICE flashing tends to arrive with. Answer these at the ice machine before anyone is booked. [All problems](https://icemachinerepair.center/problems/) Before you call ### [Ice Machine Error Code or Flashing Light: What It Is Telling You](https://icemachinerepair.center/problems/ice-machine-error-code/) [All 7 causes, cheapest first](https://icemachinerepair.center/problems/ice-machine-error-code/) It also comes with - [**Ice Machine Running but Not Making Ice**](https://icemachinerepair.center/problems/ice-machine-not-making-ice/) - [**Ice Machine Making Too Little Ice for the Rush**](https://icemachinerepair.center/problems/ice-machine-making-little-ice/) Problem ### Ice Machine Error Code or Flashing Light: What It Is Telling You 7 causes, cheapest first Where ICE flashing usually leads ## Ice machine harvest repair. **Thickness probe, curtain switch, harvest assist and hot gas valve · low to moderate.** Book a visit [What the job involves](https://icemachinerepair.center/services/ice-machine-harvest-repair/) ## Sub-Zero ice machines. Sub-Zero ice machine calls in a home check the drain route and the water line with the same care as the ice itself. [Sub-Zero ice machine repair](https://icemachinerepair.center/brands/sub-zero/) More Sub-Zero codes [CLEAN flashing](https://icemachinerepair.center/error-codes/sub-zero-clean-flashing/) [REPLACE FILTER](https://icemachinerepair.center/error-codes/sub-zero-replace-filter/) Harvest and freeze cycle on other makes [Atosa E2](https://icemachinerepair.center/error-codes/atosa-e2/) [Blue Air E1](https://icemachinerepair.center/error-codes/blue-air-e1/) [Follett HI AMPS](https://icemachinerepair.center/error-codes/follett-hi-amps/) [Hoshizaki 1 beep](https://icemachinerepair.center/error-codes/hoshizaki-1-beep/) [Ice-O-Matic Error 1](https://icemachinerepair.center/error-codes/ice-o-matic-error-1/) [Koolaire SL#1](https://icemachinerepair.center/error-codes/koolaire-sl1/) [Manitowoc E01](https://icemachinerepair.center/error-codes/manitowoc-e01/) [Scotsman 1](https://icemachinerepair.center/error-codes/scotsman-1/) [All 26 codes of this kind](https://icemachinerepair.center/error-codes/#family-harvest) Sub-Zero builds this ### Undercounter ice machine A self-contained ice machine that makes and stores its own ice under a bar, a service counter or a kitchen island, from commercial units to clear-ice models in large homes. ## In Sub-Zero's own words > UC-15I Undercounter Ice Makers have an automatic shut-off mode that turns the unit off after one of the following occurs [Sub-Zero answer: UC-15I not running with ICE indicator flashing](https://www.subzero-wolf.com/assistance/answers/sub-zero/undercounter-ice-makers/uc15i-ice-maker-not-running-with-ice-indicator-flashing) [Sub-Zero answer: UC-15I not running with ICE indicator flashing](https://www.subzero-wolf.com/assistance/answers/sub-zero/undercounter-ice-makers/uc15i-ice-maker-not-running-with-ice-indicator-flashing) [Sub-Zero answer: UC-15I not running with ICE indicator flashing](https://www.subzero-wolf.com/assistance/answers/sub-zero/undercounter-ice-makers/uc15i-ice-maker-not-running-with-ice-indicator-flashing) [Sub-Zero UC-15I undercounter ice machine use and care guide](https://www.subzero-wolf.com/-/media/files/united-states/product-downloads/sub-zero-wolf/use-and-care/sub-zero/uc-15i-ucg.ashx) Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Sub-Zero UC-15I and UC-15IP, indoor and outdoor, with the POWER, ICE, DELAY, CLEAN and REPLACE FILTER touch panel. The Designer DEU1550I guide could not be read, so it is not covered. ## Sub-Zero ICE flashing ice machine 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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Find the water shut-off for the ice machine, behind the kickplate, in a nearby cabinet or in the basement, and make sure it is fully open. If it comes back, it needs a visit. ### How do I reset a Sub-Zero ice machine with the ICE light flashing? Fix the reason it stopped first: open the water, then give it an hour. Sub-Zero also suggests running it briefly without the filter to see whether flow was the problem. ### Can a clogged filter make my Sub-Zero ICE light flash? Yes. A restricted filter slows the water, cycles run long and the machine shuts itself off. The REPLACE FILTER light comes on after 8,000 cycles, but a filter can clog sooner on poor water. ### My Sub-Zero ice machine ran for two days and then the ICE light started flashing. Why? The second shut-off condition is about 120 cycles that never fill the bin. Very warm surroundings melt the unrefrigerated bin as fast as it fills, or the bin thermostat may not be sensing the ice, so book a visit if the room is normal. --- **[Read on the site: Sub-Zero ice machine with the blue ICE light flashing: automatic shut-off](https://icemachinerepair.center/error-codes/sub-zero-ice-flashing/)** **[Book a visit with IceMachineRepair.center](https://icemachinerepair.center/schedule/)**