Quick answer
Use a dishwasher cleaner tablet to remove buildup and odors. Run an empty cycle with the tablet to clean the interior. Repeat every few months for maintenance.
Confirm the symptom
- Dishwasher has a foul odor
- Dishes are not clean despite using detergent
- Visible mold or mildew in the dishwasher
Tools and prep
- Dishwasher cleaner tablet
- Gloves (optional, for handling tablet)
- Empty dishwasher
- Turn off power to dishwasher (for safety)
Step-by-step troubleshooting
- Prepare the DishwasherDo: Remove all dishes and debris from the dishwasher.Observe: Interior is clean and free of obstructions.Means: Ensures the cleaner tablet works effectively.Next: Add the cleaner tablet
- Add the Cleaner TabletDo: Place the cleaner tablet in the dishwasher's center or as per the manufacturer's instructions.Observe: Tablet is properly positioned and ready to dissolve.Means: The tablet will dissolve during the cycle to clean the interior.Next: Run the cleaning cycle
- Run the Cleaning CycleDo: Select the hottest available cycle with a long wash time (usually the 'Clean' or 'Sanitize' cycle).Observe: Dishwasher completes the cycle without errors.Means: High heat helps dissolve the tablet and remove buildup.Next: Allow to cool
- Allow to CoolDo: Let the dishwasher cool completely before opening.Observe: Interior is cool to the touch.Means: Prevents steam burns and ensures safety.Next: Inspect and clean
- Inspect and CleanDo: Open the dishwasher and check for any remaining debris or residue.Observe: Interior is clean and free of mold or mildew.Means: Confirms the cleaning was effective.Next: Resume normal use
- Resume Normal UseDo: Wipe the door gasket and interior with a damp cloth. Restart the dishwasher normally.Observe: Dishwasher functions properly without odors.Means: Ensures the dishwasher is ready for regular use.Next: Complete
Common causes
| Cause | Likelihood | Difficulty | Part often needed |
|---|---|---|---|
| Hard water buildup Mineral deposits from water reduce cleaning efficiency and cause odors. | Common | Easy | Descaler or cleaner tablets |
| Food residue and mold Leftover food particles and moisture create mold and bad smells. | Common | Easy | Cleaner tablets or vinegar |
| Clogged filter A dirty filter prevents proper water drainage and causes odors. | Sometimes | Easy–Medium | Dishwasher filter |
| Faulty drain pump A malfunctioning pump can leave standing water, leading to mold and odors. | Rare | Hard | Drain pump |
| Improper detergent use Using the wrong detergent or too little can leave residue and odors. | Sometimes | Easy | Dishwasher detergent |
| Seal or gasket issues A damaged door seal can trap moisture and cause mold. | Rare | Medium | Door gasket |
Parts matching
Common parts needed for a dishwasher cleaner tablet issue:
- Dishwasher cleaner tablets
- White vinegar (as a natural alternative)
- Baking soda (for deodorizing)
- Dishwasher filter (if clogged)
- Dishwasher detergent (if improper use is the cause)
Always follow the manufacturer's guidelines for cleaner tablet use and maintenance.
When to call a professional
- Strong, persistent odors remain after multiple cleanings
- Dishwasher leaks during or after the cleaning cycle
- Error codes appear during the cleaning cycle
- The cleaner tablet does not dissolve properly
- Standing water remains after the cycle completes
FAQ
How often should I use a dishwasher cleaner tablet?
Use a cleaner tablet every 1–2 months for regular maintenance, or more often if you notice odors or poor cleaning performance.
Can I use vinegar instead of a cleaner tablet?
Yes, you can use 1–2 cups of white vinegar in the dishwasher's bottom for a natural cleaning alternative. Run a hot cycle without dishes.
Why won't my cleaner tablet dissolve?
This may be due to low water temperature or a clogged dispenser. Check the dishwasher's heating element and dispenser for blockages.
Is it safe to use a cleaner tablet with my dishwasher's warranty?
Most cleaner tablets are safe for use, but always check the manufacturer's guidelines to avoid voiding your warranty.
Can I use baking soda with a cleaner tablet?
Yes, sprinkle 1 cup of baking soda in the dishwasher's bottom before running the cycle for extra deodorizing power.