Whirlpool Dishwasher Smells Bad: How to Fix It
Quick answer
A bad smell in your Whirlpool dishwasher is often caused by trapped food particles or mold. Clean the filter, run a vinegar cycle, and check for clogs to eliminate the odor.
Confirm the symptom
- Unpleasant odor when opening the dishwasher
- Smell worsens after a cycle
- Notice mold or mildew near the door or drain
Tools and prep
- Plastic scraper — To remove debris from the filter
- White vinegar — To sanitize and deodorize
- Baking soda — To neutralize odors
- Soft brush — To scrub hard-to-reach areas
- Microfiber cloth — To wipe surfaces and seals
Disclosure: We may earn a commission from qualifying purchases via affiliate links. Learn more.
Prep & safety
- Wear rubber gloves to protect your hands during cleaning.
- Unplug the dishwasher to ensure safety before cleaning internal parts.
Step-by-step troubleshooting
Clean the Filter
Do: Locate the filter at the bottom of the dishwasher and remove it. Use a plastic scraper to remove food particles and debris.
Observe: Filter is clogged with food and grime.
Means: Clogged filter is causing odor.
Next: Rinse the filter under running water and reinstall it.
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: Vinegar neutralizes odors and removes buildup.
Means: Sanitizing the interior reduces smell.
Next: Allow the dishwasher to air dry after the cycle.
Clean the Spray Arms
Do: Remove the spray arms and check for clogs. Use a soft brush to clear any blockages in the spray holes.
Observe: Spray arms are clogged with debris.
Means: Clogged spray arms prevent proper cleaning and can trap odors.
Next: Reinstall the spray arms and run a test cycle.
Wipe Down the Interior
Do: Use a microfiber cloth dampened with water and baking soda to wipe the interior walls and door seal.
Observe: Mold or mildew is visible on surfaces.
Means: Moisture buildup has caused mold growth.
Next: Dry the interior thoroughly with a clean cloth.
Check the Drain Hose
Do: Inspect the drain hose for kinks or clogs. Ensure it is properly connected to the sink drain.
Observe: Drain hose is clogged or improperly connected.
Means: Poor drainage leads to standing water and odors.
Next: Clear the clog or adjust the hose as needed.
Use a Baking Soda Cycle
Do: Sprinkle a cup of baking soda on the bottom of the dishwasher. Run a normal cycle to neutralize odors.
Observe: Odor is significantly reduced after the cycle.
Means: Baking soda effectively neutralizes lingering smells.
Next: Maintain regular cleaning to prevent future odors.
Common causes table
| Cause | Why | Likelihood | Difficulty | Part often needed |
|---|---|---|---|---|
| Clogged filter | Food particles trap moisture and bacteria. | High | Low | Dishwasher filter |
| Mold or mildew growth | Moisture buildup in the interior creates a breeding ground. | Medium | Low | None |
| Clogged spray arms | Debris blocks water flow and traps odors. | Medium | Low | Spray arms |
| Improper drainage | Standing water in the bottom causes foul smells. | High | Medium | Drain hose |
| Hard water buildup | Mineral deposits create a film that traps odors. | Medium | Low | Descaler or rinse aid |
| Food residue in door seal | Seal traps food particles and moisture. | High | Low | Door seal |
Parts matching
Replace parts with the correct specifications for your Whirlpool model.
- Dishwasher filter: match the model number from the appliance tag
- Spray arms: ensure they fit the mounting holes and spray pattern
- Door seal: measure the length and check for compatibility with your model
- Drain hose: verify the diameter and length for proper fit
Check the Whirlpool website for your model-specific parts list.
Disclosure: We may earn a commission from qualifying purchases via affiliate links. Learn more.
When to call a pro
- The odor persists after multiple cleaning cycles
- You notice a foul smell coming from the drain line or garbage disposal
- The dishwasher is not draining properly despite clearing the drain hose
- You hear gurgling sounds or notice water pooling at the bottom
- The appliance is over 10 years old and frequent repairs are needed
FAQ
How often should I clean my Whirlpool dishwasher?
Clean the filter and run a vinegar or baking soda cycle every 1–2 months to prevent odors.
Can I use bleach to clean my dishwasher?
Avoid bleach as it can damage rubber seals. Use vinegar or baking soda instead.
Why does my dishwasher smell like rotten eggs?
This is often caused by a buildup of bacteria in the drain system. Run a vinegar cycle and check the drain hose for clogs.
Is it normal for my dishwasher to have a slight smell after use?
A mild odor is normal if the door is left open to air out. A strong or foul smell indicates a problem.
Can hard water cause bad odors in my dishwasher?
Yes, mineral buildup can trap food particles and bacteria. Use a rinse aid or descaler to reduce this issue.