Fix a New Dishwasher That Smells Bad
Quick answer
A new dishwasher may smell bad due to trapped food particles or residual manufacturing materials. Clean the filter, run a hot water cycle, and use a dishwasher cleaner to eliminate odors.
Confirm the symptom
- Notice a foul smell when opening the dishwasher
- Smell persists after running a cycle
- Dishes have a lingering odor after cleaning
Tools and prep
- Dishwasher cleaner — To remove buildup and odors
- White vinegar — Natural deodorizer and cleaner
- Baking soda — Neutralizes odors and cleans
- Soft brush — For scrubbing the filter
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Prep & safety
- Wear rubber gloves to protect your hands.
- Ensure the dishwasher is empty before cleaning.
Step-by-step troubleshooting
Clean the Filter
Do: Remove the filter at the bottom of the dishwasher and rinse it under running water. Use a soft brush to scrub away debris.
Observe: The filter is free of food particles and debris.
Means: The filter was clogged, causing bad odors.
Next: Run a hot water cycle with vinegar.
Run Vinegar Cycle
Do: Place a cup of white vinegar in a dishwasher-safe container on the top rack. Run a hot water cycle without dishes.
Observe: The vinegar neutralizes odors and dissolves buildup.
Means: Residual manufacturing materials or mildew are being removed.
Next: Use dishwasher cleaner for deep cleaning.
Use Dishwasher Cleaner
Do: Follow the manufacturer's instructions to run a dishwasher cleaner tablet or powder in a hot water cycle.
Observe: The cleaner removes stubborn buildup and odors.
Means: The cleaner effectively targets trapped debris and bacteria.
Next: Check for lingering smells.
Check for Lingering Smells
Do: Open the dishwasher after the cycle and check if the smell is gone.
Observe: The dishwasher smells clean and fresh.
Means: The odor issue is resolved.
Next: Complete
Clean the Door Seal
Do: Wipe the rubber door gasket with a damp cloth and baking soda paste to remove mold or mildew.
Observe: The gasket is clean and dry.
Means: Mold or mildew was causing the odor.
Next: Run another hot water cycle.
Run Another Hot Water Cycle
Do: Run an empty hot water cycle to ensure all cleaning agents are rinsed away and no odors remain.
Observe: The dishwasher is clean and odor-free.
Means: The odor issue is fully resolved.
Next: Complete
Common causes table
| Cause | Why | Likelihood | Difficulty | Part often needed |
|---|---|---|---|---|
| Clogged filter | Food particles trapped in the filter can cause bad odors. | High | Low | Filter |
| Residual manufacturing materials | New dishwashers may have odors from factory residues. | Medium | Low | Dishwasher cleaner |
| Mold or mildew in the door seal | Moisture trapped in the gasket can lead to mold growth. | Medium | Low | None |
| Improper water temperature | Cold water may not clean effectively, leading to odors. | Low | Medium | Water heater |
| Hard water buildup | Mineral deposits can trap odors and bacteria. | Medium | Low | Water softener |
| Improper use of detergent | Using the wrong detergent can leave residue and odors. | Low | Low | Dishwasher detergent |
Parts matching
When replacing parts, ensure they match your dishwasher model.
- Filter: model number and size
- Dishwasher cleaner: compatible with your dishwasher type
- Water softener: compatible with your water system
- Detergent: recommended by the manufacturer
Check the manufacturer's website for part specifications.
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When to call a pro
- The odor persists after multiple cleaning cycles
- You notice a strong chemical smell that doesn't go away
- The dishwasher is making unusual noises along with the odor
- You suspect a water supply issue
- The door seal is damaged and cannot be cleaned effectively
FAQ
Can I use bleach to clean my dishwasher?
Avoid using bleach as it can damage the dishwasher and leave harmful residues. Use vinegar or a dishwasher cleaner instead.
How often should I clean my dishwasher filter?
Clean the filter every 1–2 months to prevent odor and buildup.
Why does my new dishwasher smell like plastic?
New dishwashers may have a plastic smell from manufacturing. Run several hot water cycles with vinegar to eliminate it.
Is it normal for a new dishwasher to have a slight odor?
A mild odor is normal initially, but it should dissipate after a few cycles. Persistent odors need attention.