Fix a Bad Smell Coming from Your Dishwasher
Quick answer
To eliminate bad odors from your dishwasher, clean the filter, check for trapped food, and run a cleaning cycle with vinegar or a dishwasher cleaner. Regular maintenance prevents future smells.
Confirm the symptom
- Notice a foul or musty odor after a cycle
- Smell persists even when the dishwasher is empty
- Dishes smell bad after washing
Tools and prep
- Plastic scraper — To remove debris from the filter
- White vinegar — To deodorize and clean the interior
- Microfiber cloth — To wipe down surfaces
- Dishwasher cleaner — To deep clean the interior
- Rubber gloves — To protect hands during cleaning
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Prep & safety
- Wear rubber gloves to protect your hands during cleaning.
- Unplug the dishwasher to ensure safety before starting.
Step-by-step troubleshooting
Check the Filter
Do: Locate and remove the filter at the bottom of the dishwasher.
Observe: Filter is clogged with food particles and debris.
Means: Clogged filter is causing bad odors.
Next: Clean the filter thoroughly.
Clean the Filter
Do: Use a plastic scraper to remove debris and rinse the filter under running water.
Observe: Filter is clean and free of residue.
Means: Filter is now clean and functional.
Next: Reinstall the filter and proceed to the next step.
Inspect the Drain Hose
Do: Check the drain hose for any blockages or trapped food particles.
Observe: Drain hose is clear and free of obstructions.
Means: Drain hose is not the source of the odor.
Next: Move on to the next step if the hose is clear.
Clean the Interior
Do: Place a cup of white vinegar in a dishwasher-safe container on the top rack and run a hot water cycle without dishes.
Observe: Vinegar neutralizes odors and cleans the interior.
Means: Interior is now deodorized and clean.
Next: Allow the dishwasher to air dry after the cycle.
Wipe Down Surfaces
Do: Use a microfiber cloth to wipe down the interior walls, door, and rubber gasket.
Observe: Surfaces are clean and free of mold or mildew.
Means: Surfaces are now sanitized and odor-free.
Next: Close the dishwasher door and plug it back in.
Run a Dishwasher Cleaner Cycle
Do: Place a dishwasher cleaner tablet in the bottom of the dishwasher and run a hot water cycle.
Observe: Cleaner dissolves and removes buildup and odors.
Means: Dishwasher is thoroughly cleaned and deodorized.
Next: Check if the odor is resolved.
Check for Standing Water
Do: Inspect the bottom of the dishwasher for any standing water.
Observe: No standing water is present.
Means: Standing water is not the cause of the odor.
Next: If odor persists, consider calling a professional.
Common causes table
| Cause | Why | Likelihood | Difficulty | Part often needed |
|---|---|---|---|---|
| Clogged filter | Trapped food particles and debris cause odors. | High | Low | Dishwasher filter |
| Food buildup in the drain hose | Decomposing food in the hose emits bad smells. | Medium | Low | None |
| Mold or mildew in the interior | Moisture and food residue create a breeding ground for mold. | Medium | Low | None |
| Standing water in the bottom | Stagnant water can develop a foul odor over time. | Low | Low | None |
| Lack of regular cleaning | Infrequent cleaning allows odors to build up. | High | Low | Dishwasher cleaner |
| Faulty drain pump | A malfunctioning pump can cause water to remain in the dishwasher. | Low | High | Drain pump |
Parts matching
When replacing parts for your dishwasher, ensure compatibility with your model.
- Dishwasher filter: match the size and model number from your dishwasher manual
- Dishwasher cleaner: choose a brand compatible with your dishwasher type
- Drain pump: verify the model number and specifications from the manufacturer
Consult your dishwasher's manual for specific part numbers and compatibility information.
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When to call a pro
- The odor persists after multiple cleaning cycles
- Standing water remains despite cleaning
- You notice a foul smell coming from the drain hose
- The dishwasher filter is damaged and cannot be cleaned
- You hear unusual noises or the dishwasher is not draining properly
- You suspect a faulty drain pump or electrical issue
FAQ
How often should I clean my dishwasher filter?
Clean the filter every 1-2 months to prevent odor buildup and maintain performance.
Can I use bleach to clean my dishwasher?
Avoid using bleach as it can damage the dishwasher's interior and components. Use vinegar or a dishwasher cleaner instead.
Why does my dishwasher smell like rotten eggs?
A rotten egg smell is often caused by a buildup of bacteria or a malfunctioning drain pump. Clean the filter and interior, and check for standing water.
Is it normal for my dishwasher to have a slight smell after a cycle?
A slight smell is normal if the dishwasher is clean. A strong or foul odor indicates a need for cleaning or maintenance.