Published October 6, 2026 | uhfld
A washing machine that smells is a Florida problem as much as a washer problem. Every washer leaves some water and soap residue behind after a cycle. In a dry climate that residue dries out between loads. In a Tampa garage or laundry closet, where humidity sits above 70 percent much of the year, it stays damp, and damp soap film is exactly what mildew and odor-causing bacteria feed on. Front-load washers, with their tight door seals and closed drums, are especially prone. The fix is mostly cleaning and habits, with a short list of parts that sometimes need replacing.
A smelly washing machine is usually caused by mildew in the front-load door seal, detergent and fabric softener residue coating the tub, standing water in the drain pump filter, or, if it smells like sewage rather than mildew, a drain standpipe problem in the plumbing behind the machine.
Clean the door seal, run a hot tub-clean cycle, clean the drain pump filter, and leave the door open between loads. If the smell is sewage, or the seal has black spots that will not clean off, the cause is beyond routine cleaning.
This guide covers where the smell comes from, how to clean each source properly, what habits keep it from coming back, and when a part needs replacing. We repair washers across Tampa Bay, including the many two-story homes in Riverview with upstairs laundry rooms, where a musty washer is often the first thing a homeowner notices.
The rubber door seal, sometimes called the bellow or boot, folds back on itself to make a watertight seal against the door. Water, lint, hair, coins and detergent collect in that fold after every load, and because the door is usually closed between washes, it never dries. Pull the fold back and you will often find gray slime, black spots or a small puddle at the bottom.
Wipe the fold out with a cloth, getting all the way to the back of it, and dry it. For mildew, follow your washer manual’s cleaning instructions; most manufacturers recommend a dilute bleach solution or a washer cleaner product, then a thorough rinse. Check the small drain holes at the bottom of the seal and clear any lint from them.
If black spots remain after cleaning, the mold has grown into the rubber itself. It will not come out, and the smell will return. The seal can be replaced; it is a common repair on front-loaders.
High-efficiency washers use very little water, which means soap that is not fully rinsed away builds up on the outer tub, the hidden surface between the drum you see and the outer shell. Using too much detergent, using non-HE detergent, liquid fabric softener and washing everything on cold all make it worse. The residue forms a film that holds moisture and odor.
Most modern washers have a Tub Clean or Self Clean cycle. Run it empty, with the cleaner your manual recommends, roughly once a month. Then cut back on detergent: HE washers typically need a fraction of what the cap measures, and more soap does not clean better. Running an occasional hot wash also helps clear residue that cold cycles leave behind.
Pull out the detergent dispenser drawer as well. Mildew grows in the drawer housing, behind where you can see. Most drawers release with a tab, and both the drawer and the cavity behind it can be scrubbed.
Most front-load washers have a small access panel at the bottom front that opens to the drain pump filter. It catches coins, buttons, hair and lint before they reach the pump, and it always holds a little water. If it is never cleaned, that water stagnates and the debris rots.
Lay down towels and put a shallow pan under the access panel, because a fair amount of water will come out. Unscrew the filter slowly, let the water drain, pull the filter out and clean it. This is also where a washer that drains slowly or throws a drain error, such as 5C on a Samsung or OE on an LG, usually turns out to be blocked.
If the smell is sewage rather than mildew, look behind the washer. The washer drain hose goes into a standpipe connected to the house drain, and that standpipe should have a trap holding water to block sewer gas. If the trap has dried out, is missing, or the drain line is partly blocked, gas comes up into the laundry room.
A drain hose pushed too far down into the standpipe can also siphon water out of the washer and the trap. The hose usually only needs to go in several inches. Standpipe and trap problems are plumbing, not appliance repair, but they are worth ruling out before replacing washer parts.
See our washer repair page for every other washer fault, and our Samsung and LG pages for brand-specific error codes.
A smelly washer is usually mildew in the door seal, residue in the tub, or a neglected drain pump filter, and all three are cleaning jobs. Florida humidity means it comes back faster than in drier climates, so the habits matter as much as the cleaning. Mold grown into the seal, drain problems and sewage smells are the cases that need more than a cloth and a clean cycle.
Most often because of mildew and bacteria growing in the rubber door seal, in detergent residue on the outer tub, or in standing water in the drain pump filter. Front-loaders seal tightly and stay damp inside, and Florida humidity makes it worse. Clean the seal, run a tub-clean cycle, clean the pump filter and leave the door open between loads.
Usually because the washer itself is harboring mildew or residue, or because loads are left wet in the drum. Too much detergent and liquid fabric softener build a film that traps odor. Clean the washer, reduce detergent and move laundry to the dryer promptly.
A sewage smell usually comes from the drain plumbing, not the washer. The standpipe trap may be dry, missing or partly blocked, or the drain hose may be pushed too far into the standpipe and siphoning the trap dry. That is a plumbing issue to check before replacing washer parts.
Run a tub-clean cycle about once a month, wipe the door seal after the last load of the day, and clean the drain pump filter every few months. In humid climates like Tampa, staying on that schedule matters more.
Yes. If mold has grown into the rubber and black spots remain after cleaning, the seal can be replaced. It is a common front-load repair and usually much cheaper than a new washer.
Mold grown into the door seal, a slow drain pump or water left in the drum are all repairable. We carry common front-load seals and pumps.
Book a washer repair Call (813) 722-0777
