Dishwasher Not Cleaning Dishes

Quick answer

Check the dishwasher's spray arms for clogs, ensure the detergent is correctly placed, and verify the water temperature. Clean the filter and inspect the drain to prevent water from pooling.

Confirm the symptom

• Dishes are still dirty after a full cycle
• Food particles remain on plates and utensils
• Water spots or streaks on glassware
• Dishwasher completes cycle but doesn't clean properly

Tools and prep

• Rubber gloves
• Soft brush or toothbrush
• Vinegar or citric acid cleaner
• Screwdriver (if needed for filter access)
• Flashlight
• Clean cloth or paper towels
• Ensure the dishwasher is unplugged or power is off before starting

Step-by-step troubleshooting

1. Check Water Temperature
   Do: Verify the water temperature at the dishwasher inlet is at least 120°F (49°C).
   Observe: Cold water may not activate detergent properly.
   Means: Low water temperature can prevent effective cleaning.
   Next: Adjust the water heater if the temperature is too low.
2. Inspect Spray Arms
   Do: Remove the spray arms and check for clogs or debris.
   Observe: Blocked spray arms restrict water flow and cleaning.
   Means: Clogs prevent proper water distribution.
   Next: Clean the spray arms with a brush and water.
3. Clean the Filter
   Do: Locate and remove the dishwasher filter, then clean it thoroughly.
   Observe: A dirty filter can cause poor drainage and cleaning.
   Means: Debris in the filter reduces water circulation.
   Next: Rinse the filter under running water and reinstall.
4. Check Detergent Use
   Do: Ensure the correct type and amount of detergent is being used.
   Observe: Using too little or the wrong detergent can lead to poor cleaning.
   Means: Inadequate detergent doesn't break down food particles.
   Next: Use a high-quality detergent designed for dishwashers.
5. Inspect the Drain
   Do: Check the dishwasher drain for blockages or standing water.
   Observe: Standing water indicates a clogged drain.
   Means: A clogged drain prevents proper water removal.
   Next: Clear the drain and ensure the air gap is clear.
6. Test the Detergent Dispenser
   Do: Ensure the detergent dispenser is opening during the cycle.
   Observe: If the dispenser doesn't open, detergent won't be released.
   Means: A faulty dispenser prevents proper detergent use.
   Next: Clean or replace the dispenser if necessary.
7. Check for Proper Loading
   Do: Ensure dishes are loaded correctly, not blocking spray arms.
   Observe: Improper loading can restrict water flow.
   Means: Blocked spray arms reduce cleaning effectiveness.
   Next: Rearrange dishes to allow proper water circulation.

Common causes

Parts matching

If you need to replace parts, look for these common dishwasher components:

• Dishwasher detergent dispenser
• Spray arms
• Dishwasher filter
• Water inlet valve
• Drain pump

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

When to call a professional

• If the dishwasher still doesn't clean after cleaning all components
• If the water temperature is correct but the issue persists
• If you notice unusual noises or leaks during operation
• If the detergent dispenser is damaged and cannot be replaced easily
• If the drain pump is not working and needs professional repair

FAQ

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