Dishwasher Filters How to Clean (Troubleshooting Guide)

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Quick answer
Confirm the symptom
Tools and prep
Step-by-step troubleshooting
Common causes table
Parts matching
When to call a pro
FAQ
Related guides

Quick answer

To clean a dishwasher filter, first unplug the unit or turn off the circuit breaker. Remove the bottom rack and locate the filter at the center of the tub. Use a soft brush and warm, soapy water to scrub away debris, then rinse and dry before reinstalling. This should resolve odors and improve cleaning performance.

Confirm the symptom

Dishes have food particles or residue after washing
Unpleasant odors coming from the dishwasher
Water pooling at the bottom of the dishwasher

Tools and prep

Plastic putty knife
Soft-bristled brush (toothbrush or dish scrubber)
Warm, soapy water
Clean towel or rag
Gloves (optional)
Empty dishwasher
Turn off power to dishwasher (unplug or circuit breaker)

Step-by-step troubleshooting

Remove the bottom rack
Do: Take out the bottom rack to access the filter area.
Observe: You should see the filter at the center of the tub.
Means: The filter is accessible for cleaning.
Next: Locate the filter
Locate the filter
Do: Identify the filter, usually a circular or oval component at the base of the tub.
Observe: The filter may be partially covered by a grate or debris.
Means: You can now proceed to remove the filter.
Next: Remove the filter
Remove the filter
Do: Gently twist or lift the filter to remove it from the tub.
Observe: The filter may be stuck with debris or mineral buildup.
Means: The filter is now out and ready for cleaning.
Next: Clean the filter
Clean the filter
Do: Scrub the filter with a soft-bristled brush and warm, soapy water to remove debris and buildup.
Observe: Debris and grime should loosen and rinse away.
Means: The filter is now clean and ready for reinstallation.
Next: Rinse and dry the filter
Rinse and dry the filter
Do: Rinse the filter thoroughly under running water and dry with a clean towel.
Observe: The filter should be free of soap and completely dry.
Means: The filter is ready to be reinstalled.
Next: Reinstall the filter
Reinstall the filter
Do: Place the filter back into the tub and secure it by twisting or pressing it into place.
Observe: The filter should fit snugly and sit level with the tub.
Means: The filter is properly installed.
Next: Replace the bottom rack
Replace the bottom rack
Do: Slide the bottom rack back into the dishwasher.
Observe: The rack should fit smoothly and sit securely.
Means: The dishwasher is ready for use.
Next: Test the dishwasher
Test the dishwasher
Do: Plug the dishwasher back in or restore power, then run a test cycle with a light load of dishes.
Observe: The dishwasher should operate normally with no odors or pooling water.
Means: The filter cleaning was successful.
Next: Monitor performance

Common causes

Cause	Likelihood	Difficulty	Part often needed
Food debris trapped in the filter Food particles can clog the filter, reducing water flow and causing odors.	Common	Easy	No
Mineral buildup from hard water Hard water can leave mineral deposits that clog the filter over time.	Common	Easy	No
Improper filter installation A filter that is not seated properly can allow debris to bypass the filter.	Sometimes	Easy	No
Damaged filter Cracks or breaks in the filter can allow debris to pass through.	Rare	Easy	Yes
Clogged drain hose A clogged drain hose can cause water to back up into the filter area.	Sometimes	Medium	No
Faulty drain pump A malfunctioning drain pump can prevent proper drainage, leading to water pooling.	Rare	Hard	Yes
Improper leveling of the dishwasher An unlevel dishwasher can cause water to pool at the bottom, affecting the filter.	Rare	Easy	No

Parts matching

If cleaning the filter doesn't resolve the issue, you may need to replace it or other parts. Common parts that may be needed include:

New dishwasher filter (specific to your model)
Drain hose (if clogged or damaged)
Drain pump (if faulty)
Water inlet valve (if water isn't heating properly)

Always refer to your dishwasher's manual for specific part numbers and installation instructions.

When to call a professional

If the dishwasher still emits odors after multiple cleanings
If water continues to pool at the bottom despite cleaning the filter
If the filter is damaged and cannot be replaced easily
If the dishwasher doesn't drain properly after cleaning the filter
If you suspect a faulty drain pump or other internal components

FAQ

How often should I clean my dishwasher filter?

It's recommended to clean the dishwasher filter every 1–2 months, depending on usage and water hardness.

Can I use vinegar or bleach to clean the filter?

Avoid using vinegar or bleach on the filter, as they can damage the plastic or rubber components. Use warm, soapy water instead.

What if the filter is difficult to remove?

If the filter is stuck, gently twist it while lifting. Avoid using excessive force to prevent damage.

Why does my dishwasher still smell bad after cleaning the filter?

Persistent odors may indicate a clogged drain hose, a faulty drain pump, or mold in the dishwasher. Check these components next.

Can I replace the filter myself?

Yes, most dishwasher filters can be replaced by homeowners with basic tools. Refer to your manual for model-specific instructions.