--- title: "Miele F373 — drain filter loose" description: "What F373 means on Miele F373 — drain filter looses, what to check before booking, and when it is not a failure at all." url: "https://appliancemaintenance.center/error-codes/miele-f373/" --- # Miele F373 — drain filter loose Miele's support page gives F373's cause directly: a leak detected in the area of the drain filter, because the drain filter has not been screwed tight. ## What F373 actually means. Miele's support page gives F373's cause directly: a leak detected in the area of the drain filter, because the drain filter has not been screwed tight. The fix given is to screw the drain filters tight, which is a hand-adjustment rather than a part replacement. Miele home appliance display What to do when F373 shows on the home appliance ### Kind of code Water, fill and drain Water is arriving too slowly or leaving too slowly, and the cause is usually something that collects over time: a washer drain filter holding lint, coins and hair, a dishwasher sump filter full of food, inlet screens clogged with grit from the supply, or too much detergent leaving suds the machine cannot rinse. Clear the filter over a tray with the machine unplugged, check that the supply valves are fully open, run a cleaning cycle, and book a visit if the hose itself leaks or bulges. ### Usually leads to Drum seal and drain filter cleaning The door boot, drain filter, detergent drawer and fill hoses on the washer cleaned and checked, and the machine leveled. ### 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 Miele Miele appliances tell you when they want care, from descaling prompts on steam ovens and coffee systems to filter reminders on the dishwasher and the dryer. ### Source Miele customer assistance, F373 Confirmed on Miele's own customer-assistance page for its laundry line. ## Before you book, in this order. Each step comes from Miele's own guidance for F373 on its home appliances. Follow it to the end: the last card says whether this is a visit. 01 Locate the drain filter and check that it is screwed in fully, not just resting in place. 02 Wipe away any standing water around the filter housing before restarting a cycle. 03 If F373 returns with the filter clearly tightened, book a visit so the filter housing seal itself can be checked. ### Still there? It usually turns into [drum seal and drain filter cleaning](https://appliancemaintenance.center/services/drum-seal-and-drain-filter-cleaning/). Book with the code and the model number. ### What not to do F373 is not a drain pump failure; Miele's own cause is a loose filter, not a pump or hose failure. A unit that leaks steadily from a different location with the drain filter properly tightened is a different problem. ## What you may notice with it. The home appliance problems F373 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 Where F373 usually leads ## Drum seal and drain filter cleaning. **Drain filter cleared, door boot and detergent drawer cleaned, tub clean run, fill hoses checked and machine leveled · low.** Book a visit [What the job involves](https://appliancemaintenance.center/services/drum-seal-and-drain-filter-cleaning/) ## Miele home appliances. Miele appliances tell you when they want care, from descaling prompts on steam ovens and coffee systems to filter reminders on the dishwasher and the dryer. [Miele home appliance maintenance](https://appliancemaintenance.center/brands/miele/) More Miele codes [F170](https://appliancemaintenance.center/error-codes/miele-f170/) [F60](https://appliancemaintenance.center/error-codes/miele-f60/) [F95](https://appliancemaintenance.center/error-codes/miele-f95/) [Grease filter symbol lights up](https://appliancemaintenance.center/error-codes/miele-hood-grease-filter/) [Charcoal filter symbol lights up](https://appliancemaintenance.center/error-codes/miele-hood-charcoal-filter/) Water, fill and drain on other makes [Bosch E25](https://appliancemaintenance.center/error-codes/bosch-e25/) [Electrolux i40](https://appliancemaintenance.center/error-codes/electrolux-i40-clogged-filter-sump/) [Frigidaire i40](https://appliancemaintenance.center/error-codes/frigidaire-i40/) [GE Profile 18](https://appliancemaintenance.center/error-codes/ge-profile-washer-code-18/) [LG Drain pump filter cleaning](https://appliancemaintenance.center/error-codes/lg-washer-drain-pump-filter/) [Maytag Clean the Filter](https://appliancemaintenance.center/error-codes/maytag-dishwasher-filter-cleaning/) [Speed Queen Filter Screens](https://appliancemaintenance.center/error-codes/speed-queen-filter-screens-check/) [Whirlpool Clean Filter](https://appliancemaintenance.center/error-codes/whirlpool-clean-filter-compact-washer/) [All 10 codes of this kind](https://appliancemaintenance.center/error-codes/#family-water) Miele 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. Miele builds this ### Cooking appliances Upkeep for ovens, ranges, cooktops, hoods, microwaves, steam and speed ovens: burners and igniters cleaned, gas joints checked, grease filters and descaling done on time. Miele 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. ## In Miele's own words > Fault F373 appears in the washing machine display. A leak was detected in the area of the drain filter. The drain filter has not been screwed tight. Screw the drain filters tight. [Miele customer assistance, F373](https://web.archive.org/web/20260308233043/https://www.mieleusa.com/support/customer-assistance/washer-1323/all/fault_f373-207841472779) Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Confirmed on Miele's own customer-assistance page for its laundry line. ## Miele F373 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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Locate the drain filter and check that it is screwed in fully, not just resting in place. If it comes back, it needs a visit. ### Why would the drain filter come loose on its own? A filter that was hand-tightened only lightly after its last cleaning, or that was bumped during a load, can work loose enough for a small leak to trigger F373 well before it falls out completely. ### How do I know the drain filter is tight enough? Miele's fix is simply to screw it tight; turning it until it stops firmly, rather than leaving it finger-loose, is what the message is checking for. ### Does F373 mean water damage has already happened? It means a leak was detected in that specific area, which is usually caught early; wiping up any water and tightening the filter promptly is the main step before running another cycle. --- **[Read on the site: Miele F373 — drain filter loose](https://appliancemaintenance.center/error-codes/miele-f373/)** **[Book a visit with ApplianceMaintenance.center](https://appliancemaintenance.center/schedule/)**