--- title: "Sub-Zero REPLACE FILTER — water filter due" description: "What REPLACE FILTER lit red means on Sub-Zero REPLACE FILTER — water filter dues, what to check before booking, and when it is not a failure at all." url: "https://appliancemaintenance.center/error-codes/sub-zero-replace-filter/" --- # Sub-Zero REPLACE FILTER — water filter due Sub-Zero's own ice maker guide lights REPLACE FILTER in red once the unit completes 8,000 ice-making cycles, or Sub-Zero elsewhere recommends changing the same filter roughly every six months, whichever comes first. ## What REPLACE FILTER lit red actually means. Sub-Zero's own ice maker guide lights REPLACE FILTER in red once the unit completes 8,000 ice-making cycles, or Sub-Zero elsewhere recommends changing the same filter roughly every six months, whichever comes first. Sub-Zero home appliance display What to do when REPLACE FILTER lit red shows on the home appliance ### Kind of code Filters A filter has reached the end of its life or is clogged enough for the appliance to notice: a refrigerator water cartridge past its gallons or months, a hood's grease or charcoal filter loaded with residue, a dish-care filter packed with food, a washer inlet filter choked with grit. The fix is a clean or a new filter of the right part number, fitted with the appliance unplugged and the water closed where there is one, then the reminder reset. ### Usually leads to Water filter and descaling service Fresh filters in dispensers and ice makers, and scale cleared from steam ovens, ice makers and dish care machines. ### Shows up as Water or Ice Tasting Stale: Filter Age, Scale and Idle Lines Water or ice tasting stale is dispenser water, cubes or nugget ice with a flat, musty, chemical or freezer-food taste, often cloudy, slow to come or smaller than it used to be. ### Make Sub-Zero A Sub-Zero lasts decades when its condenser is kept clean, its door seals stay supple and its water filter is changed on schedule, and that is what a visit covers. ### Source Sub-Zero UC-15I ice maker use and care guide Confirmed in Sub-Zero's UC-15I ice maker use and care guide; the guide also notes the filter should be changed every six months, after a prolonged shutdown, or after 8,000 cycles, whichever comes first. ## Before you book, in this order. Each step comes from Sub-Zero's own guidance for REPLACE FILTER lit red on its home appliances. Follow it to the end: the last card says whether this is a visit. 01 Replace the water filter with the model-specific part. 02 Touch and hold CLEAN for 6 seconds to reset the indicator once the new filter is fitted. 03 If REPLACE FILTER lights again well before the expected interval, book a visit to check the water supply and flow. ### Still there? It usually turns into [water filter and descaling service](https://appliancemaintenance.center/services/water-filter-and-descaling-service/). Book with the code and the model number. ### What not to do REPLACE FILTER is not a report that the ice maker itself has failed; the light is a cycle-count reminder cleared by swapping the filter, not a diagnosis of the appliance. ## What you may notice with it. The home appliance problems REPLACE FILTER lit red tends to arrive with. Answer these at the home appliance before anyone is booked. [All problems](https://appliancemaintenance.center/problems/) Before you call ### [Water or Ice Tasting Stale: Filter Age, Scale and Idle Lines](https://appliancemaintenance.center/problems/water-or-ice-tasting-stale/) [All 6 causes, cheapest first](https://appliancemaintenance.center/problems/water-or-ice-tasting-stale/) It also comes with - [**Appliance Maintenance Code or Reminder Light: Filter, Descale, Vent Check**](https://appliancemaintenance.center/problems/appliance-maintenance-code/) Problem ### Water or Ice Tasting Stale: Filter Age, Scale and Idle Lines 6 causes, cheapest first Where REPLACE FILTER lit red usually leads ## Water filter and descaling service. **Water filters replaced and flushed, inlet screens checked, descaling run on a steam oven, ice maker or dish care machine · low.** Book a visit [What the job involves](https://appliancemaintenance.center/services/water-filter-and-descaling-service/) ## Sub-Zero home appliances. A Sub-Zero lasts decades when its condenser is kept clean, its door seals stay supple and its water filter is changed on schedule, and that is what a visit covers. [Sub-Zero home appliance maintenance](https://appliancemaintenance.center/brands/sub-zero/) More Sub-Zero codes [SERVICE flashing](https://appliancemaintenance.center/error-codes/sub-zero-service-flashing/) [CLEAN flashing](https://appliancemaintenance.center/error-codes/sub-zero-clean-flashing/) [Door alarm chime](https://appliancemaintenance.center/error-codes/sub-zero-door-alarm/) Filters on other makes [Bertazzoni Replace water filter. Press OK to start](https://appliancemaintenance.center/error-codes/bertazzoni-coffee-replace-water-filter/) [BlueStar Timer icon blinking, blower off](https://appliancemaintenance.center/error-codes/bluestar-hood-timer-filter/) [Bosch E22](https://appliancemaintenance.center/error-codes/bosch-e22/) [Café Replace Filter light (ice maker)](https://appliancemaintenance.center/error-codes/cafe-replace-filter-ice-maker/) [Cove Clean filter. Press Enter once cleaned, or press Cancel to ignore.](https://appliancemaintenance.center/error-codes/cove-clean-filter/) [Dacor Filter Reset](https://appliancemaintenance.center/error-codes/dacor-filter-reset/) [Electrolux Water Filter Status](https://appliancemaintenance.center/error-codes/electrolux-water-filter-status/) [Fisher & Paykel CLr FLtr](https://appliancemaintenance.center/error-codes/fisher-and-paykel-washer-clr-fltr/) [All 44 codes of this kind](https://appliancemaintenance.center/error-codes/#family-filter) Sub-Zero builds this ### Cold storage Upkeep for everything in the house that keeps things cold: refrigerators, freezers, wine and beverage units and ice makers, cleaned and checked before they start struggling. ## In Sub-Zero's own words > When the unit completes 8000 ice making cycles, “REPLACE FILTER” will illuminate red to indicate the water filter needs to be replaced. Touch and hold “CLEAN” for 6 seconds to reset the indicator. [Sub-Zero UC-15I ice maker 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) [Sub-Zero UC-15I ice maker 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. Confirmed in Sub-Zero's UC-15I ice maker use and care guide; the guide also notes the filter should be changed every six months, after a prolonged shutdown, or after 8,000 cycles, whichever comes first. ## Sub-Zero REPLACE FILTER lit red home appliance maintenance, 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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Replace the water filter with the model-specific part. If it comes back, it needs a visit. ### Does the ice maker need to be shut off to change the filter? No. Sub-Zero's own guide notes the unit bypasses the filter when it is removed, so the water supply does not need to be turned off during the swap. ### Which comes first, six months or 8,000 cycles? Sub-Zero's guide lists both as triggers for a change, so a household making ice heavily may hit the cycle count before the six-month mark, and vice versa for lighter use. ### What happens if the filter is left in past its due point? Ice and water quality can decline gradually as the filter's capacity is used up, which is part of why Sub-Zero ties the reminder to a specific cycle count rather than leaving it open-ended. --- **[Read on the site: Sub-Zero REPLACE FILTER — water filter due](https://appliancemaintenance.center/error-codes/sub-zero-replace-filter/)** **[Book a visit with ApplianceMaintenance.center](https://appliancemaintenance.center/schedule/)**