--- title: "Sub-Zero 30 8 30: water moving through a valve that should be closed" description: "What 30 8 30 means on Sub-Zero 30 8 30: water moving through a valve that should be closeds, what to check before booking, and when it is not a failure at all." url: "https://icemakerrepair.center/error-codes/sub-zero-30-8-30/" --- # Sub-Zero 30 8 30: water moving through a valve that should be closed On Classic (BI) built-in models, 30 8 30 means the control saw water flowing even though it had not opened the water valve. ## What 30 8 30 actually means. On Classic (BI) built-in models, 30 8 30 means the control saw water flowing even though it had not opened the water valve. A valve that lets water by can overfill the ice maker, spill into the bin or freezer, or leave water where it should not be. Sub-Zero ice maker display · also shown as 30-8-30, 30830 What to do when 30 8 30 shows on the ice maker ### Kind of code Water supply and fill The ice maker asked for water and got too little, too slowly or none at all, or water kept arriving after the fill should have ended. A closed shutoff, a kinked line, a clogged filter and low house pressure are ruled out before the water inlet valve is replaced or the fill tube is thawed. If water is on the floor, close the supply valve before reading anything on the display. ### Usually leads to Ice maker water inlet valve repair The electric valve that lets water into the ice maker, tested and replaced when it will not open, opens only partway, or keeps dripping after it should have closed. ### Shows up as Ice Maker Leaking on the Floor A puddle that spreads from under the door dispenser, from the kickplate of the freezer, from beneath an undercounter unit or around a countertop model, and comes back after you mop it up is the classic sign of an ice maker leaking on the floor. ### Make Sub-Zero Sub-Zero ice maker service, for ice makers in built-in units and those under the counter. ### Source Sub-Zero answer: Classic built-in error code 30 8 30 Sub-Zero Classic (BI) built-in models with an ice maker and flow sensing. ## Before you book, in this order. Each step comes from Sub-Zero's own guidance for 30 8 30 on its ice makers. Follow it to the end: the last card says whether this is a visit. 01 Look under and around the unit and inside the freezer for water; if you find any, close the water shutoff valve feeding the unit. 02 Switch the unit's home breaker off for 30 seconds and back on, but only if the panel and floor near it are dry. 03 Leave the water off and book a visit if 30 8 30 returns. ### Still there? It usually turns into [ice maker water inlet valve repair](https://icemakerrepair.center/services/water-inlet-valve-repair/). Book with the code and the model number. ### What not to do 30 8 30 is not about low pressure or a clogged filter. It is the opposite: water moving when the valve is supposed to be closed. ## What you may notice with it. The ice maker problems 30 8 30 tends to arrive with. Answer these at the ice maker before anyone is booked. [All problems](https://icemakerrepair.center/problems/) Before you call ### [Ice Maker Leaking on the Floor](https://icemakerrepair.center/problems/ice-maker-leaking-on-floor/) [All 6 causes, cheapest first](https://icemakerrepair.center/problems/ice-maker-leaking-on-floor/) It also comes with - [**Ice Clumped or Frozen in the Bin**](https://icemakerrepair.center/problems/ice-clumped-or-frozen-in-bin/) - [**Ice Maker Water Line Leaking Behind the Cabinet**](https://icemakerrepair.center/problems/water-line-leaking-behind/) - [**Ice Maker Error Code**](https://icemakerrepair.center/problems/ice-maker-error-code/) Water on the floor or near power ### Ice Maker Leaking on the Floor 6 causes, cheapest first Where 30 8 30 usually leads ## Ice maker water inlet valve repair. **Water inlet valve and its fittings · low to moderate.** Book a visit [What the job involves](https://icemakerrepair.center/services/water-inlet-valve-repair/) ## Sub-Zero ice makers. Sub-Zero ice maker service, for ice makers in built-in units and those under the counter. [Sub-Zero ice maker repair](https://icemakerrepair.center/brands/sub-zero/) More Sub-Zero codes [EC30](https://icemakerrepair.center/error-codes/sub-zero-ec30/) [30 8 05](https://icemakerrepair.center/error-codes/sub-zero-30-8-05/) [30 8 10](https://icemakerrepair.center/error-codes/sub-zero-30-8-10/) [30 9 01](https://icemakerrepair.center/error-codes/sub-zero-30-9-01/) [30 9 10](https://icemakerrepair.center/error-codes/sub-zero-30-9-10/) [30 9 86](https://icemakerrepair.center/error-codes/sub-zero-30-9-86/) [40 8 40](https://icemakerrepair.center/error-codes/sub-zero-40-8-40/) [40 8 01](https://icemakerrepair.center/error-codes/sub-zero-40-8-01/) [40 9 40](https://icemakerrepair.center/error-codes/sub-zero-40-9-40/) [50 U 86](https://icemakerrepair.center/error-codes/sub-zero-50-u-86/) [50 U 87](https://icemakerrepair.center/error-codes/sub-zero-50-u-87/) [ICE flashing blue](https://icemakerrepair.center/error-codes/sub-zero-ice-flashing-blue/) [All 15 Sub-Zero codes](https://icemakerrepair.center/error-codes/#codes-sub-zero) Water supply and fill on other makes [Café Making Ice and Filter lights flashing alternately](https://icemakerrepair.center/error-codes/cafe-making-ice-and-filter-lights-flashing-alternately/) [GE Profile Leak Detected](https://icemakerrepair.center/error-codes/ge-profile-leak-detected/) [GE Leak Detected](https://icemakerrepair.center/error-codes/ge-leak-detected/) [JennAir Replace Filter light flashing](https://icemakerrepair.center/error-codes/jennair-replace-filter-light-flashing/) [Kenmore Er gF](https://icemakerrepair.center/error-codes/kenmore-er-gf/) [KitchenAid Replace Filter light flashing](https://icemakerrepair.center/error-codes/kitchenaid-replace-filter-light-flashing/) [LG gF](https://icemakerrepair.center/error-codes/lg-gf/) [Liebherr IceMaker ON/OFF lamp flashing](https://icemakerrepair.center/error-codes/liebherr-icemaker-lamp-flashing/) [All 36 codes of this kind](https://icemakerrepair.center/error-codes/#family-water) Sub-Zero builds this ### Door ice maker The ice maker that feeds the dispenser on the outside of a door: tucked into an insulated box in the left door of a French door model, or at the top of the freezer side of a side-by-side, with a chute and an auger carrying cubes to your glass. Sub-Zero builds this ### Freezer ice maker The ice maker that sits inside the freezer compartment itself, a tray that twists or a mold with a heater and an ejector, dropping cubes into a bin or drawer you open by hand, with no dispenser on the door. Sub-Zero builds this ### Undercounter ice maker A built-in residential ice maker that lives under a kitchen, bar or basement counter, making clear cubes or chewable nugget ice on its own cooling system, with a water line in and a gravity drain or a small drain pump out. ## In Sub-Zero's own words > Water valve not opened but water observed passing through [Sub-Zero answer: Classic built-in error code 30 8 30](https://www.subzero-wolf.com/assistance/answers/sub-zero/classic/built-in-series-error-code-30-8-30) [Sub-Zero answer: Classic built-in error code 30 8 30](https://www.subzero-wolf.com/assistance/answers/sub-zero/classic/built-in-series-error-code-30-8-30) Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Sub-Zero Classic (BI) built-in models with an ice maker and flow sensing. ## Sub-Zero 30 8 30 ice maker 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 under and around the unit and inside the freezer for water; if you find any, close the water shutoff valve feeding the unit. If it comes back, it needs a visit. ### Why is 30 8 30 on a Sub-Zero treated as urgent? Water that passes a closed valve has nowhere planned to go. It can overfill the mold, freeze the bin solid or run out of the unit, so shutting the supply while you wait is the safe move. ### Where is the water shutoff for a Sub-Zero built-in? It is usually under the sink, in a cabinet next to the unit, behind the kickplate or in the basement below the kitchen. Closing it stops the flow until the valve is tested. ### Can 30 8 30 come from a worn water valve on an older Sub-Zero? A valve that no longer seals fully is one likely cause, since the code describes water passing a valve that was not opened. A technician confirms it before replacing the valve. --- **[Read on the site: Sub-Zero 30 8 30: water moving through a valve that should be closed](https://icemakerrepair.center/error-codes/sub-zero-30-8-30/)** **[Book a visit with IceMakerRepair.center](https://icemakerrepair.center/schedule/)**