Brand New Dishwasher Smells Bad: How to Fix It
Quick answer
A brand new dishwasher may smell bad due to residual manufacturing oils or trapped food particles. Run a hot water cycle with vinegar or a dishwasher cleaner to eliminate the odor. Ensure the dishwasher is properly installed and the drain is clear.
Confirm the symptom
- Notice a foul or musty odor from the dishwasher
- Smell persists after initial use
- Dishes come out with a lingering bad smell
Tools and prep
- White vinegar — Natural odor eliminator
- Dishwasher cleaner — Designed for deep cleaning
- Soft brush — For scrubbing filters and interior
- Rubber gloves — Protect hands during cleaning
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Prep & safety
- Wear rubber gloves to protect your hands.
- Ensure the dishwasher is empty before starting the cleaning process.
Step-by-step troubleshooting
Run a 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 should neutralize odors and clean the interior.
Means: The vinegar helps remove residual oils and trapped particles.
Next: Check if the smell is gone after the cycle.
Clean the Filter
Do: Locate and remove the dishwasher filter. Rinse it under running water and use a soft brush to scrub away debris.
Observe: The filter is clean and free of food particles.
Means: A clogged filter can trap odors.
Next: Reinstall the filter and run another cycle.
Use a Dishwasher Cleaner
Do: Run a dishwasher cleaner tablet or powder according to the manufacturer's instructions.
Observe: The cleaner removes buildup and odors.
Means: Commercial cleaners are effective for deep cleaning.
Next: Check for improvement after the cycle.
Inspect the Drain
Do: Check the drain hose and air gap for clogs or debris. Clear any blockages with a soft brush or cloth.
Observe: The drain is clear and free of obstructions.
Means: A clogged drain can cause stagnant water and odors.
Next: Run a cycle to see if the smell persists.
Check Installation
Do: Ensure the dishwasher is properly installed and level. Improper installation can lead to water pooling and odors.
Observe: The dishwasher is stable and level.
Means: Proper installation prevents water from pooling.
Next: If the smell remains, consider contacting the manufacturer.
Run a Hot Water Cycle
Do: Run a hot water cycle with a rinse aid to ensure thorough cleaning and drying.
Observe: The interior is dry and free of moisture.
Means: Moisture can contribute to bad odors.
Next: Check for any remaining odors.
Common causes table
| Cause | Why | Likelihood | Difficulty | Part often needed |
|---|---|---|---|---|
| Residual manufacturing oils | New dishwashers may have oils from the manufacturing process that can cause odors. | High | Low | No |
| Trapped food particles | Food particles can get stuck in the filter or drain, causing bad smells. | High | Low | No |
| Improper installation | A dishwasher that is not level can cause water to pool and create odors. | Medium | Medium | No |
| Clogged drain or air gap | A clogged drain can trap water and cause foul odors. | Medium | Low | No |
| Insufficient cleaning agents | Using too little detergent or not using a rinse aid can leave residue and cause odors. | Low | Low | No |
| Moisture buildup | If the dishwasher does not dry properly, moisture can lead to mold and mildew. | Low | Low | No |
Parts matching
If the dishwasher requires parts for cleaning or installation, ensure the following match:
- Filter: model number and size
- Drain hose: diameter and length
- Air gap: model compatible with your dishwasher
Always refer to the dishwasher's manual for specific part requirements.
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When to call a pro
- The odor persists after multiple cleaning cycles
- The dishwasher is not draining properly despite cleaning
- You notice water pooling at the bottom of the dishwasher
- The dishwasher is not heating water properly
- The smell is accompanied by unusual noises or leaks
FAQ
Can I use bleach to clean my dishwasher?
It's not recommended to use bleach as it can damage the dishwasher's interior and leave harmful residues.
How often should I clean my dishwasher filter?
Clean the filter every 1-2 months to prevent buildup and odors.
Why does my dishwasher smell like rotten eggs?
A rotten egg smell may indicate a bacterial buildup or a problem with the drain.
Is it normal for a new dishwasher to have a smell?
A slight smell after installation is normal, but it should dissipate after a few cycles.
Can using the wrong detergent cause bad odors?
Yes, using the wrong detergent can leave residue and cause odors. Always use the recommended type.