A Whirlpool WTW8127 that leaves clothes smelling sour, or gives off a musty smell when you lift the lid, has a build-up of residue that has started to grow mold and bacteria. This is common in high-efficiency top-loaders, which use less water than older machines. Less water means detergent, fabric softener and dirt are carried away less completely, and the film left on the tub wall, under the lid and in the dispensers is food for odor-causing growth.
The checks in more detail
A drum that is shut tight between loads, cold washing and too much detergent all make the problem worse. Clean the machine itself. Run a hot cycle with a washer cleaner made for high-efficiency machines, following the product label, with the washer empty. Because this model has a removable agitator, lift it out while you clean: wipe the post, the underside of the agitator and the tub floor around it, where slime collects.
Wipe the underside of the lid, the rim of the tub and the dispensers with a cloth and a mild cleaner; remove and wash any removable dispenser parts, and check the Load & Go reservoir and its dosing line for build-up. Do not mix cleaners, and never combine bleach with other products, because dangerous fumes result. Then change what feeds the problem. Use the amount of high-efficiency detergent shown on the bottle for the load, not more, and check the Load & Go concentration setting matches your detergent, since extra detergent leaves residue.
Use less fabric softener or switch to dryer sheets. Wash towels and workout clothes hot now and then. Take wet laundry out as soon as the cycle ends, and leave the lid open between loads so the drum dries. If a smell returns within days despite cleaning and good habits, check the drain for a blockage and the drain hose for trapped water, and see whether water lingers in the tub after a cycle; contact Whirlpool if it does.
Differential
Likely causes of “Whirlpool WTW8127 top-load washer smells musty, sour or like mildew”, and how to tell them apart
- 1
Detergent and softener residue
What separates it A film under the lid and on the dispensers
How to confirm Wipe and clean the dispensers
- 2
Slime around the agitator post
What separates it The smell is worst on lifting the lid
How to confirm Remove the agitator and clean the post
- 3
Too much detergent
What separates it Suds and slime in the tub
How to confirm Measure the dose and check the Load & Go setting
- 4
A closed, damp drum
What separates it The smell returns within days
How to confirm Leave the lid open
- 5
Standing water in the drain
What separates it Water remains after the cycle
How to confirm Check the drain
Before you touch a setting
Record this first — changing settings destroys the evidence
- Where the smell is strongest, such as the lid or the dispenser
- Whether the agitator has been lifted out and cleaned
- The detergent type and the Load & Go setting
- How soon after cleaning the smell returns
Try in this order
0 of 6 completedRemove the agitator
ReversibleAnd wipe the post and tub floor.
Run a hot cycle
ReversibleWith a washer cleaner.
Wipe lid, rim and dispensers
ReversibleWith a mild cleaner.
Check the Load & Go setting
ReversibleMatch your detergent.
Leave the lid open
ReversibleBetween loads.
Check the drain
ReversibleIf a smell returns.
Model-specific
What is true of this model and not of its siblings
- Why high-efficiency machines smell
- They use far less water than older washers, so soap film and soil are rinsed away less completely and stay on the tub wall and under the lid, where mold and bacteria can feed on them.
- Cleaning properly
- A washer cleaner made for high-efficiency machines, used in a hot cycle, loosens the film. Follow the label for the amount and run the full cycle without clothes.
- The removable agitator
- Lifting out the agitator exposes the post and the tub floor beneath it, a place slime builds that a cycle alone does not reach.
- Never mix cleaners
- Bleach and other cleaners can release dangerous fumes together. Use one product at a time, rinse in between and ventilate the room.
- The habit that matters most
- Leave the lid open after each load so the drum can dry. A closed, damp drum is the best place for mold to grow.
- Standing water
- If water remains in the tub or hose after the cycle, it will smell. Check the drain hose and the drain for a blockage and contact Whirlpool if water does not leave.
- Parts for this problem on the WTW8127 (RepairClinic, 2026-09-20)
- filter-pump, drain, part number W11568797, at $17.45; fabric softner assembly bezel, part number W11550898, at $28.37; drain pump, part number W11396717, at $139.60.
Stop boundary
When this stops being a self-service repair
- !Never mix bleach with other cleaners
- !Ventilate the room while cleaning
- !Contact Whirlpool if water stays in the tub after a cycle
Evidence ledger
Sources behind this answer
Exact questions
Common questions
Why does my washer smell musty?+
Residue and damp let mold and bacteria grow.
Is it harmful?+
It is unpleasant and can transfer to clothes, but cleaning removes it.
Will a hot wash help?+
Yes, a monthly hot cycle helps.
Can I use vinegar?+
Follow the manual; do not mix with bleach.
Why do clean clothes smell?+
They were washed in a smelly drum.
How do I prevent it?+
Less detergent, a monthly hot clean cycle and an open lid between loads.