Quick answer
To eliminate a mildew smell from your washer, clean the drum, rubber seal, and detergent dispenser with vinegar or bleach. Ensure the washer is well-ventilated after each use.
Confirm the symptom
- Notice a musty or mildew odor coming from the washer
- Smell is strongest after the washer sits idle for a while
- Odor is present even after running a cleaning cycle
Tools and prep
- White vinegar or bleach
- Soft cloth or sponge
- Old towel or rag
- Rubber gloves
- Microfiber cloth
- Clean water bucket
- Ensure washer is unplugged for safety
- Turn off water supply if needed
Step-by-step troubleshooting
- Clean the DrumDo: Mix equal parts water and vinegar or use 1/2 cup bleach in a bucket. Wipe the interior drum with the solution.Observe: Stains or residue may come off during cleaning.Means: Mildew buildup is likely present in the drum.Next: Move to the rubber seal cleaning.
- Clean the Rubber SealDo: Use a cloth soaked in vinegar or bleach to clean under and around the rubber seal where water can collect.Observe: Mold or mildew may be visible in the crevices.Means: Standing water in the seal is causing the odor.Next: Proceed to the detergent dispenser.
- Clean the Detergent DispenserDo: Remove the dispenser and soak it in the vinegar or bleach solution. Scrub with a sponge and rinse thoroughly.Observe: Residue or mold may be trapped inside the dispenser.Means: Detergent residue is contributing to the smell.Next: Dry all components thoroughly.
- Dry ComponentsDo: Wipe all cleaned parts with a dry towel and leave the washer door open to air dry for several hours.Observe: The washer should feel dry to the touch and have no lingering moisture.Means: Proper drying prevents future mildew growth.Next: Run a cleaning cycle.
- Run a Cleaning CycleDo: Use a commercial washer cleaner or run an empty hot water cycle with 2 cups of vinegar or 1/2 cup of bleach.Observe: The washer should run without unusual noises or smells.Means: The cleaning process is effective.Next: Monitor for odor recurrence.
- Monitor for Odor RecurrenceDo: Check the washer after a few days for any return of the mildew smell.Observe: If the smell returns, more thorough cleaning or part replacement may be needed.Means: Persistent mildew indicates an ongoing issue.Next: Consider calling a professional if the odor persists.
Common causes
| Cause | Likelihood | Difficulty | Part often needed |
|---|---|---|---|
| Mold and Mildew in Drum Moisture trapped in the drum after use creates a breeding ground for mildew. | Common | Easy | None |
| Dirty Rubber Seal Water collects in the rubber seal, leading to mold and mildew growth. | Common | Easy | None |
| Clogged Detergent Dispenser Residue buildup in the dispenser can cause unpleasant odors. | Common | Easy | Detergent dispenser |
| Lack of Ventilation Not leaving the washer door open after use traps moisture inside. | Common | Easy | None |
| Hard Water Deposits Mineral buildup can trap moisture and promote mildew growth. | Sometimes | Easy–Medium | Water softener |
| Faulty Drain Pump A clogged or malfunctioning drain pump can leave standing water in the washer. | Rare | Hard | Drain pump |
| Worn Door Gasket A damaged gasket may not seal properly, allowing moisture to accumulate. | Rare | Medium | Door gasket |
Parts matching
If cleaning doesn't resolve the mildew smell, you may need to replace these parts:
- Detergent dispenser for clogged or damaged units
- Door gasket if it's cracked or not sealing properly
- Drain pump if water is not draining correctly
- Water softener for areas with hard water
Purchase parts specific to your washer model for compatibility.
When to call a professional
- The mildew smell persists after multiple cleaning attempts
- You notice visible mold or water damage inside the washer
- The washer makes unusual noises during the cleaning cycle
- Standing water remains after the washer has completed a cycle
- You suspect internal component damage or electrical issues
FAQ
Can I use bleach instead of vinegar to clean my washer?
Yes, you can use 1/2 cup of bleach in place of vinegar. However, always follow the manufacturer's guidelines to avoid damage.
How often should I clean my washer to prevent mildew?
It's recommended to clean your washer once a month with vinegar or a commercial cleaner to prevent mildew buildup.
Why does my washer smell even after cleaning?
Persistent odors may indicate a deeper issue like a clogged drain pump or a damaged gasket that requires part replacement or professional repair.
Is it safe to run the washer with the door open to dry it?
Yes, leaving the door open after use is safe and helps prevent moisture buildup that causes mildew.
Can hard water cause a mildew smell in my washer?
Yes, hard water can lead to mineral deposits that trap moisture and promote mildew growth. Consider using a water softener if this is a recurring issue.