Kenmore Dishwasher Not Cleaning: Troubleshooting Tips & Solutions

Emily Jul 26, 2026

Are you experiencing less-than-pristine results after running your Kenmore dishwasher? You're not alone. While Kenmore dishwashers are generally reliable, they can sometimes fail to live up to their cleaning standards, leading to spotted dishes and glassware. Here, we delve into the possible reasons why your Kenmore dishwasher might not be cleaning effectively and provide practical solutions to troubleshoot and enhance its performance.

How To Reset Kenmore Elite Dishwasher
How To Reset Kenmore Elite Dishwasher

A dishwasher's effectiveness depends on various factors, such as water pressure, temperature, detergent, and the condition of the machine itself. Let's explore each of these aspects to help you get your Kenmore dishwasher cleaning like new again.

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Dishwasher Not Draining? How to Check and Unclog a Dishwasher

Water Pressure and Temperature

The water entering your dishwasher needs to be hot and have sufficient pressure to clean your dishes adequately. Let's examine these critical factors:

Kenmore dishwasher won't start
Kenmore dishwasher won't start

Insufficient Water Pressure

Low water pressure can result in poor cleaning, as the water may not be forceful enough to remove food particles and stains. To check if your water pressure is adequate, you can use a pressure gauge, with ideal pressure ranging between 60-70 psi. If it's below this range, you might need to consult a plumber to rectify the issue.

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How To Fix Kenmore Dishwasher Lock On Light

Clearing the aerator (the screen at the end of the faucet) can also help improve water pressure, as it may have become clogged with minerals over time.

Water Temperature

Water temperature plays a significant role in dishwasher cleaning efficiency. Most detergents require water to be at least 120°F (49°C) to activate fully. If your water heater isn't maintaining this temperature, your dishes may not be getting clean. Ensure that your water heater is functioning correctly and adjust the temperature if necessary.

Kenmore 58715264900A Dishwasher
Kenmore 58715264900A Dishwasher

Alternatively, you can use a dishwasher with a built-in heating element, which can booster the water temperature even if your home's water isn't hot enough.

Detergent and Rinse Aid

Choosing the right detergent and using an adequate amount is crucial for optimal cleaning. Additionally, using a rinse aid can help reduce water spots and improve drying. Let's explore these aspects:

Kenmore Dishwasher Error Codes
Kenmore Dishwasher Error Codes

Detergent Choice and Amount

Using the correct type of detergent is essential. Powder and gel detergents are typically more effective than tablets or singles, as they contain more active cleaning agents. Ensure that you're using the appropriate amount as well; too much can cause excessive suds, leading to poor cleaning and potential machine damage.

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Cleaning filter in Kenmore dishwasher.MOV
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Always use a detergent specifically designed for dishwashers, and follow the instructions on the packaging for the correct dosage.

Rinse Aid

Rinse aid is not a substituting agent but rather enhances the cleaning process by reducing water spots and enabling better drying. Using a rinse aid can help if your dishes come out cloudy or have water spots. Always use the recommended amount to avoid suds buildup.

Consider placing the detergent cup and rinse aid dispenser on the top rack to ensure even distribution of the cleaning agents and better overall cleaning.

Machine Malfunctions

Despite your best efforts, sometimes the issue might be with the dishwasher itself. Here are two common culprits:

Faulty Spray Arms

Spray arms are essential for cleaning by directing water jets to all areas of the dishwasher. If one or both arms are clogged or damaged, they may not be spinning properly or distributing water evenly. Inspect the spray arms visually, and clean any clogs using a mixture of white vinegar and water. Replace them if necessary.

Additionally, ensure that the arms aren't being hindered by dishes or other items – they should have free rotation to work efficiently.

Worn-out or Malfunctioning Pump

The pump helps circulate water throughout the dishwasher and towards the spray arms. A faulty pump can result in low water pressure and poor cleaning performance. If you suspect the pump is the issue, consult a professional for repairs, as it's typically not a DIY job.

Regularly cleaning your Kenmore dishwasher and inspecting its components can help prevent most issues leading to poor cleaning. By addressing water pressure, temperature, detergent choices, and machine malfunctions, you should be able to restore your dishwasher's cleaning efficiency. If you've tried all the troubleshooting steps and your Kenmore dishwasher still isn't cleaning effectively, it might be time to consider reaching out to a professional for further assistance.