The short answer
Clean the seal fold, the drawer and the filter, then run a hot empty program - and change the two habits that matter in a flat: leave the appliance door ajar and give the cupboard or room some ventilation. In a shared laundry, report a machine that stays foul after cleaning.
What you notice
- A musty smell from a machine several people use — No routine cleaning is happening.
- Laundry smelling of the machine rather than detergent — Residue transferring to fabric.
- Damp air in the cupboard where the machine stands — No ventilation between cycles.
- Dark marks in the seal that return quickly — The growth is established.
- A drain smell rather than a musty one — The plumbing, not the drum.
- Not this fault: a burning smell — Read the electrical-hazard page.
Ranked for shared and apartment machines
- No routine cleaning because no one owns it — First in a shared laundry.
- Door kept shut in an unventilated cupboard — Second, and specific to flats.
- Over-dosing by multiple users — Third.
- Cool programs used exclusively — Fourth.
- Pump filter never opened — Fifth, and usually spectacular when it is.
- Drain arrangement letting sewer odour back — Last, and it smells different.
Work through it in this order
- Smell the drum and then the drain hose separately — Musty and drain odours are different faults.
- Clean the seal, the drawer and the filter — In that order, by hand.
- Run a hot empty program — After the manual cleaning.
- Change the ventilation and door habits — Otherwise it returns within weeks.
Owner routine
- Wipe the door seal fold right round and dry it — Weekly, even if the machine is shared.
Tools: cloth, glovesAbout 15 min
- Scrub the detergent drawer and its housing — Multiple users means multiple products building up.
Tools: brushAbout 25 min
- Clean the pump filter over a shallow tray — Expect it to be worse than a household machine.
Tools: shallow tray, towelsAbout 30 min
- Run the hottest maintenance program empty — Monthly if you can.
- Leave the appliance door ajar and ventilate the cupboard — The habit that prevents recurrence.
About 10 min
- Stop before opening the cabinet to reach the sump or bellows — Water and mains wiring share that space.
Products, ventilation and shared machines
Safety
Unplug the appliance or switch off its breaker before removing any panel. A capacitor can hold a charge after the power is off. Never mix cleaning products in the drum - together they can produce hazardous gas, and in a small cupboard or bathroom there is nowhere for it to go. Ventilate while cleaning, wear gloves, and do not attempt repairs on a machine you do not own.
When to call
Report a shared or rented machine to the building, the landlord or the laundry operator when cleaning and hot washes do not clear the smell - the sump or the bellows may need attention, and that is their repair to arrange. Call a plumber instead if the odour is of drains rather than must, because that points at the waste connection.
Other pages for this washer
Scope of this page
Generalized across washer families under this badge, written for shared, rented and apartment installations; where a family-specific or model-specific page exists it is the narrower answer. Not here: cleaning product recommendations, program temperatures and seal part numbers.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
