Fix a Smelly LG Dishwasher: Causes and Solutions
Quick answer
To fix a smelly LG dishwasher, clean the filter and interior, run a hot water cycle, and check for trapped food particles. Regular maintenance can prevent future odors.
Confirm the symptom
- Dishwasher emits a foul smell when running
- Unpleasant odor comes from the dishwasher even when not in use
- Smell worsens after a cycle finishes
Tools and prep
- Plastic scraper — To remove debris from the filter
- White vinegar — To deodorize and sanitize the interior
- Baking soda — To neutralize odors
- Soft cloth — To wipe surfaces and filters
- Gloves — To protect hands from debris and chemicals
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Prep & safety
- Wear gloves to avoid contact with mold or bacteria.
- Unplug the dishwasher to ensure safety during cleaning.
Step-by-step troubleshooting
Check the Filter
Do: Locate the filter at the bottom of the dishwasher and remove it.
Observe: The filter is clogged with food particles and debris.
Means: The filter is the primary source of the odor.
Next: Clean the filter with a scraper and rinse thoroughly.
Clean the Filter
Do: Scrub the filter with a soft cloth and warm, soapy water.
Observe: The filter is now free of debris and clean.
Means: The filter is no longer contributing to the odor.
Next: Rinse the filter and reinstall it in the dishwasher.
Clean the Interior
Do: Sprinkle 1 cup of baking soda on the bottom of the dishwasher and let it sit for 15 minutes.
Observe: The baking soda absorbs odors and loosens grime.
Means: The interior is ready for a deep clean.
Next: Wipe down the interior with a damp cloth.
Run a Vinegar Cycle
Do: Place a cup of white vinegar in a dishwasher-safe container on the top rack and run a hot water cycle.
Observe: The vinegar evaporates, leaving the interior smelling clean.
Means: The vinegar has sanitized and deodorized the dishwasher.
Next: Allow the dishwasher to air dry after the cycle.
Check the Drain Hose
Do: Inspect the drain hose for clogs or standing water.
Observe: The drain hose is clear and free of debris.
Means: The drain hose is not the source of the odor.
Next: If clogged, clear the hose with a brush or pipe cleaner.
Inspect the Door Seal
Do: Check the rubber door seal for mold or mildew buildup.
Observe: The door seal is clean and dry.
Means: The door seal is not contributing to the odor.
Next: If mold is present, clean it with a mixture of water and vinegar.
Check for Standing Water
Do: Look for any standing water at the bottom of the dishwasher.
Observe: No standing water is present.
Means: The dishwasher is draining properly.
Next: If water is present, check the drain pump for blockages.
Test the Dishwasher
Do: Run a normal cycle with a load of dishes to test for lingering odors.
Observe: The dishwasher runs without emitting a foul smell.
Means: The odor issue has been resolved.
Next: If the smell persists, consider contacting a professional technician.
Common causes table
| Cause | Why | Likelihood | Difficulty | Part often needed |
|---|---|---|---|---|
| Clogged Filter | Food particles and debris accumulate in the filter, causing odors. | High | Low | Dishwasher Filter |
| Mold in Door Seal | Moisture trapped in the door seal promotes mold growth. | Medium | Low | Door Seal Replacement |
| Standing Water | Water trapped in the dishwasher can develop a foul smell. | Medium | Low | Drain Pump |
| Dirty Interior | Food residue and grease buildup in the interior cause odors. | High | Low | Interior Cleaner |
| Clogged Drain Hose | Debris in the drain hose prevents proper drainage and causes odors. | Medium | Medium | Drain Hose |
| Faulty Drain Pump | A malfunctioning drain pump can leave water in the dishwasher. | Low | High | Drain Pump Replacement |
| Hard Water Deposits | Mineral buildup can trap odors and create a musty smell. | Medium | Low | Water Softener |
| Improper Use of Detergent | Using the wrong type or amount of detergent can cause residue and odors. | Medium | Low | Dishwasher Detergent |
Parts matching
When replacing parts for your LG dishwasher, ensure compatibility with your model.
- Dishwasher Filter: Match the filter type and size to your LG model number.
- Door Seal Replacement: Ensure the seal fits the door dimensions of your dishwasher.
- Drain Hose: Check the hose length and connection type for compatibility.
- Drain Pump Replacement: Verify the pump model matches your dishwasher's specifications.
- Interior Cleaner: Choose a cleaner suitable for LG dishwashers and follow the instructions.
Consult your LG dishwasher's manual for specific part numbers and installation instructions.
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When to call a pro
- The odor persists after multiple cleaning attempts.
- Standing water remains despite clearing the drain hose and pump.
- The dishwasher makes unusual noises during the drain cycle.
- The door seal continues to develop mold after cleaning.
- The dishwasher does not drain properly even after checking all components.
- You suspect a faulty drain pump or electrical issue.
- You are unsure about the correct parts or installation process.
FAQ
How often should I clean my LG dishwasher filter?
Clean the filter every 1-2 months to prevent odor buildup.
Can I use bleach to clean my dishwasher?
Avoid using bleach as it can damage the dishwasher's interior. Use vinegar or baking soda instead.
Why does my dishwasher smell like rotten eggs?
A rotten egg smell is often caused by bacterial growth in standing water or a clogged drain.
How do I know if the drain pump is faulty?
If the dishwasher does not drain properly and water remains after a cycle, the drain pump may be faulty.