--- title: "ASKO Sterile Tub alert — time to clean the drum" description: "What Sterile Tub alert means on ASKO Sterile Tub alert — time to clean the drums, what to check before booking, and when it is not a failure at all." url: "https://appliancemaintenance.center/error-codes/asko-sterile-tub-alert/" --- # ASKO Sterile Tub alert — time to clean the drum The machine counts washes and puts up the message on a schedule, not because a sensor found anything. ## What Sterile Tub alert actually means. The machine counts washes and puts up the message on a schedule, not because a sensor found anything. Detergent film and lint build up in the tub and the drain path between cleanings, and a hot, empty cleaning run clears most of it. ASKO home appliance display · also shown as Sterile Tube alert What to do when Sterile Tub alert shows on the home appliance ### Kind of code Reminders, not failures Nothing has broken; the appliance has been counting hours, cycles or gallons and is asking for its routine care. A refrigerator lights a filter icon after about six months of water, a front-load washer suggests a tub-clean cycle after a set number of loads, a steam oven or a dishwasher asks for descaling or rinse aid, and some dryers remind you to check the exhaust. Do the task the reminder names, reset it the way the manual describes, and write the date in the service record. ### Usually leads to No service Take everything out of the drum and run the tub-cleaning program named in your model's manual, with no laundry inside. ### Shows up as Laundry Drum Smelling Musty: Door Boot, Drain Filter and Detergent A laundry drum smelling musty gives off a damp, sour or mildew odor when the door opens, and passes it on to clean clothes, towels and the laundry room itself. ### Make ASKO ASKO upkeep is mostly dish care and laundry: the dishwasher's filter and spray arms, and the washer's drain filter and the dryer's lint and condenser filters. ### Source ASKO washing machine user manual Documented in the ASKO washer user manual (US). ## Before you book, in this order. Each step comes from ASKO's own guidance for Sterile Tub alert on its home appliances. Follow it to the end: the last card says whether this is a visit. 01 Take everything out of the drum and run the tub-cleaning program named in your model's manual, with no laundry inside. 02 Wipe the door glass and the detergent drawer while the program runs. 03 Leave the door open afterward so the drum dries. 04 Book a visit if a musty smell stays after the cleaning run and the drain pump filter has been emptied. ### Cleared? The reminder is gone from the display, the filter, the screen or the tub has been cleaned or swapped, and the appliance runs a full cycle without calling for it again. A clean-filter light or a descale prompt that returns in days rather than months usually means the part it watches is fouling faster than normal, so mention that when you book. ### What not to do The alert is a counter, not a report of a failed part, and the washer still runs if it is put off. A water, heater or drain code on the same display is a repair instead. ## What you may notice with it. The home appliance problems Sterile Tub alert tends to arrive with. Answer these at the home appliance before anyone is booked. [All problems](https://appliancemaintenance.center/problems/) Before you call ### [Laundry Drum Smelling Musty: Door Boot, Drain Filter and Detergent](https://appliancemaintenance.center/problems/laundry-drum-smelling-musty/) [All 6 causes, cheapest first](https://appliancemaintenance.center/problems/laundry-drum-smelling-musty/) It also comes with - [**Appliance Maintenance Code or Reminder Light: Filter, Descale, Vent Check**](https://appliancemaintenance.center/problems/appliance-maintenance-code/) Problem ### Laundry Drum Smelling Musty: Door Boot, Drain Filter and Detergent 6 causes, cheapest first No service indicated ## Nothing to service. Nothing has broken; the appliance has been counting hours, cycles or gallons and is asking for its routine care. A refrigerator lights a filter icon after about six months of water, a front-load washer suggests a tub-clean cycle after a set number of loads, a steam oven or a dishwasher asks for descaling or rinse aid, and some dryers remind you to check the exhaust. Do the task the reminder names, reset it the way the manual describes, and write the date in the service record. [How to read what your home appliance is telling you](https://appliancemaintenance.center/problems/appliance-maintenance-code/) ## ASKO home appliances. ASKO upkeep is mostly dish care and laundry: the dishwasher's filter and spray arms, and the washer's drain filter and the dryer's lint and condenser filters. [ASKO home appliance maintenance](https://appliancemaintenance.center/brands/asko/) More ASKO codes [Humidity alarm (40%)](https://appliancemaintenance.center/error-codes/asko-humidity-alarm/) Reminders, not failures on other makes [Bertazzoni Turn milk froth adjustment knob to CLEAN to start cleaning](https://appliancemaintenance.center/error-codes/bertazzoni-coffee-milk-clean/) [Café Time to Clean light](https://appliancemaintenance.center/error-codes/cafe-time-to-clean/) [Cove Add rinse aid. Press Enter once added, or press Cancel to ignore.](https://appliancemaintenance.center/error-codes/cove-add-rinse-aid/) [Dacor Rinse Refill](https://appliancemaintenance.center/error-codes/dacor-rinse-refill/) [DCS DOOR flashing](https://appliancemaintenance.center/error-codes/dcs-outdoor-ice-door-flashing/) [Fulgor Milano PRESS CLEAN!](https://appliancemaintenance.center/error-codes/fulgor-milano-coffee-press-clean/) [GE Rinse Aid Indicator Window](https://appliancemaintenance.center/error-codes/ge-low-rinse-aid-indicator/) [LG tCL](https://appliancemaintenance.center/error-codes/lg-washer-tcl/) [All 28 codes of this kind](https://appliancemaintenance.center/error-codes/#family-mode) ASKO 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. ASKO builds this ### Dish care Upkeep for dishwashers and disposers: filters rinsed, spray arms cleared, the door seal and drain loop checked, and hard-water scale kept off the parts that heat and spray. ASKO builds this ### Laundry Upkeep for washers, dryers and the exhaust run behind them: lint paths cleared, drain filters and door boots cleaned, supply hoses inspected before they give way. ## In ASKO's own words > Message "Sterile Tube alert" is displayed every 40 [ASKO washing machine user manual](https://partners.gorenje.com/fts/GetDigitDoc.aspx?sifra=575155&jezik=en&tipVsebine=1&docName=575600en.pdf) Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Documented in the ASKO washer user manual (US). ## ASKO Sterile Tub alert 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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Take everything out of the drum and run the tub-cleaning program named in your model's manual, with no laundry inside. If it comes back, it needs a visit. ### How often does the ASKO Sterile Tub alert come up? Every 40 washes, by ASKO's own count, whether or not the drum looks dirty. ### Can clothes go in with the cleaning run? No. The program is meant for an empty drum; clothes would soak up the heat and the cleaner it is there to use. ### What if the reminder is ignored? The machine keeps washing, but film and lint keep building in the tub, which is where a musty smell and grey residue on laundry usually start. --- **[Read on the site: ASKO Sterile Tub alert — time to clean the drum](https://appliancemaintenance.center/error-codes/asko-sterile-tub-alert/)** **[Book a visit with ApplianceMaintenance.center](https://appliancemaintenance.center/schedule/)**