Whirlpool Dishwasher Not Cleaning [Easy Fixes]

There’s nothing more frustrating than opening your Whirlpool dishwasher after a full cycle, only to find dirty dishes staring back at you. Instead of sparkling clean plates, you’re left with food residue, cloudy glassware, or grease stuck on utensils.

If your dishwasher isn’t cleaning properly, you’re not alone—this is a common problem that can have multiple causes. A clogged spray arm, a dirty filter, or even hard water buildup could be interfering with the cleaning process.

The good news? You don’t have to replace your appliance just yet. In this guide, I’ll walk you through the possible reasons your dishwasher isn’t cleaning and how to fix them—step by step.

Let’s get started!

Quick Fixes for Whirlpool Dishwasher Not Cleaning

If your Whirlpool dishwasher isn’t cleaning properly, check the possible causes and fixes below for a fast solution.

How Do You Troubleshoot a Whirlpool Dishwasher That Doesn’t Clean Dishes?

Here’s what you can do when your dishwasher isn’t cleaning as it should:

Check the Water Supply

A Whirlpool dishwasher needs a steady water supply to clean dishes properly. If the dishwasher isn’t filling with enough water, it won’t rinse away food particles, leaving dishes dirty.

First, make sure the water supply valve is fully open. If it’s partially closed, the dishwasher may not get enough water to complete the cleaning cycle effectively. The valve is usually located under the sink, connected to the dishwasher’s water inlet hose.

Next, inspect the water inlet hose for kinks or blockages. A bent or clogged hose can reduce water flow, impacting how well the dishwasher cleans. If needed, straighten the hose or disconnect it to check for obstructions.

If your home has hard water, mineral deposits can build up in the dishwasher’s inlet valve, restricting flow. Running a cleaning cycle with a dishwasher-safe descaler can help dissolve any buildup.

Clean the Dishwasher Filter

A clogged filter prevents water from circulating properly, reducing the dishwasher’s ability to clean dishes. Over time, food debris, grease, and buildup can block the filter, leading to poor performance.

To clean it, start by removing the lower rack and locating the filter assembly at the bottom of the dishwasher. Most Whirlpool dishwashers have a twist-off or pull-out filter, but checking the user manual for specific instructions is best.

Once removed, soak the filter in warm, soapy water for 10–15 minutes. Use a soft-bristled brush to gently scrub away any stubborn residue, then rinse thoroughly.

Before reinserting the filter, check for any leftover debris in the filter housing. Wipe it clean to ensure nothing blocks water flow.

Avoid Using Pre-rinsing

While it may seem like a good idea to rinse dishes before loading them, doing so can actually reduce cleaning effectiveness. Many modern Whirlpool dishwashers use soil sensors to detect how dirty the dishes are and adjust the wash cycle accordingly.

When dishes are heavily pre-rinsed, the sensors may assume the load is already clean and shorten the cleaning cycle. This can lead to residue, streaks, or leftover food particles on plates and glassware.

Instead of pre-rinsing, scrape off excess food debris before loading the dishwasher. This removes large particles that could clog the filter while still allowing the dishwasher’s sensors to optimize the cycle.

Load the Dishwasher Correctly

Proper loading ensures water and detergent reach all surfaces. When dishes are stacked too closely or block the spray arms, water may not circulate effectively, leading to poor cleaning performance.

Place dishes soiled-side down and facing the spray arms to maximize exposure to water. Avoid nesting bowls or stacking plates too tightly, as this can prevent water from reaching all surfaces.

Keep large cookware or pans away from the spray arms to avoid blocking water flow. Also, separate aluminum utensils from glassware to prevent black or gray marks on dishes. 

Unblock or Clean the Spray Arms

If the spray arms are clogged or obstructed, water may not reach all the dishes, leading dishwasher not cleaning dishes properly. Over time, food particles, grease, and mineral deposits can block the spray arm nozzles, reducing water pressure and coverage.

To clean the spray arms:

1. Remove the spray arm by unscrewing it or following your dishwasher manual’s instructions.
2. Rinse it under warm water, using a soft brush to clear any debris.
3. Check for blocked holes and use a toothpick or small pin to remove any obstructions.
4. Reattach the spray arm and ensure it rotates freely before running a test cycle.

Additionally, make sure large dishes or utensils aren’t blocking the spray arms during a wash cycle, as this can prevent water from reaching all surfaces.

Incorrect Quality or Amount of Detergent Use

Using the wrong type or amount of detergent can leave dishes dirty, streaked, or covered in residue. Too much detergent may create buildup, while too little may not effectively break down grease and food particles.

For best results:

• Use only automatic dishwasher detergent. Regular dish soap can create excessive suds, leading to poor performance.
• Measure detergent correctly. One detergent pod or about one tablespoon of powder detergent is usually enough for a normal load. Adjust as needed for heavier or lighter loads.
• Store detergent properly. Exposure to moisture can cause powder detergent to clump and lose effectiveness. Keep it in a cool, dry place.
• Use rinse aid. This helps prevent water spots and mineral buildup, especially in areas with hard water.

Wrong Cycle Selection

Selecting the wrong wash cycle can leave dishes dirty, as each setting is designed for specific soil levels and dish types. If the cycle doesn’t provide enough water pressure, temperature, or duration, food particles may remain on dishes.

To improve cleaning performance:

• Use the Normal Cycle for everyday dish loads with moderate soil levels.
• Select the Heavy Cycle for pots, pans, and dishes with baked-on food. This cycle uses more water and higher temperatures.
• Try the Quick Wash Cycle for lightly soiled dishes when time is limited.
• Use the Sensor Cycle if available, as it automatically adjusts settings based on the load’s soil level.
• Consider a Prewash Cycle for dishes with dried or stuck-on food to loosen debris before the main wash.

Checking and adjusting the cycle settings based on your load ensures optimal cleaning results.

Clean Your Dishwasher

A dirty dishwasher interior can cause food residue, detergent buildup, and hard water deposits to affect performance. Over time, these can clog filters, block spray arms, and leave dishes spotty or greasy.

To keep the dishwasher clean:

1. Wipe down the interior with a damp cloth to remove visible debris.
2. Check and clean the filter by rinsing it under warm water to remove trapped food particles.
3. Run a cleaning cycle with a dishwasher cleaner or a cup of white vinegar placed on the top rack.
4. Sprinkle baking soda on the bottom of the dishwasher and run a short cycle for added freshness.

Cleaning the dishwasher every 30 days helps maintain its efficiency and ensures dishes come out spotless.

Ensure the Dishwasher is Getting Hot Enough

Water temperature plays a crucial role in cleaning performance. If the dishwasher isn’t heating water properly, grease and food particles may remain on dishes after a cycle. Whirlpool dishwashers require water to be at least 120°F (49°C) to dissolve detergent and break down food residue effectively.

To check and adjust water temperature:

1. Run the hot water tap in the kitchen sink for a minute before starting the dishwasher. This ensures the unit receives hot water from the start.
2. Test the water temperature by filling a glass with hot tap water and measuring it with a thermometer. If it’s below 120°F, the water heater may need adjustment.
3. Increase the water heater setting if necessary, following the manufacturer’s instructions. Avoid setting it too high, as water over 140°F can cause burns and damage dishwasher components.
4. Use the High-Temp Wash option if available, as it helps boost water temperature during the cycle.

If water remains lukewarm despite these steps, the dishwasher’s heating element or thermostat may be faulty and require inspection.

Faulty Flood Prevention Device

A flood prevention device stops water flow if it detects excessive volume or pressure. If the device is malfunctioning or improperly installed, it may restrict water from entering the appliance, leading to poor cleaning results.

To troubleshoot:

1. Check if an anti-flood valve is installed on the water supply line. It may be near the shut-off valve under the sink.
2. Inspect the device for clogs or damage. Mineral buildup or debris can block proper water flow.
3. Ensure proper installation. If the valve is positioned incorrectly, it may trigger a false shut-off, limiting water intake.
4. Run a test cycle after adjusting or replacing the device to confirm the dishwasher fills with water as expected.

Why the Bottom Rack of My Dishwasher Isn’t Getting Cleaned?

If the bottom rack of your dishwasher isn’t getting cleaned, the most common causes are improper loading, a clogged spray arm, or a blocked filter. When dishes block the spray arm’s rotation, water can’t reach everything evenly. Placing large or heavily soiled items near the center may also limit water distribution.

A clogged spray arm can prevent water from spraying effectively. Also, the dirty filter can trap debris, restricting water flow to the bottom rack.

Why My Dishwasher Isn’t Cleaning the Top Rack?

If the top rack isn’t getting clean, a blocked spray arm might be the problem. Make sure nothing is stopping it from spinning.

A clogged filter can also slow water flow. Check for trapped food and clean it regularly.

Overloading can block water from reaching all dishes. Leave space between items for better cleaning.

If the problem continues, the water inlet or pump might be weak. Check your manual or call a professional for help.

Why My Dishwasher Is Not Cleaning the Silverware?

If your silverware isn’t getting clean, avoid overloading the basket. Crowded utensils block water flow, leaving food residue behind.

Use the basket separators if available. Place forks and spoons handle-down for better exposure, but keep knife blades down for safety.

A clogged filter can also reduce cleaning power. Check for trapped debris and rinse it regularly.

When Should I Call the Professional?

If your Whirlpool dishwasher still isn’t cleaning after checking for clogs, spray arm blockages, and detergent issues, it’s time to call a professional.

Get help if the dishwasher won’t fill with water, won’t drain, or keeps showing error codes. Strange noises, leaks, or electrical problems also need expert attention.

A weak pump or motor can reduce cleaning power, and a technician can fix or replace damaged parts. If DIY solutions haven’t worked, a professional can find the issue and repair it properly, preventing bigger problems.

Conclusion

After going through all the troubleshooting steps, you now have a clear understanding of why your Whirlpool dishwasher might not be cleaning properly. Issues like clogged spray arms, a dirty filter, improper detergent use, or low water temperature can all impact cleaning performance.

Regular maintenance, such as cleaning the filter, ensuring proper water flow, and using the right detergent, can make a big difference. Loading dishes correctly and choosing the appropriate wash cycle will also help ensure better results.

If your dishwasher still isn’t performing well after trying these fixes, a deeper issue—such as a faulty pump, heating element, or flood prevention device—could be to blame. In that case, calling a professional for repair is the best option.

With these tips, you can restore your dishwasher’s cleaning power and keep your dishes spotless without unnecessary replacements or handwashing.

FAQs

Why Is My Dishwasher Running Cycle but Not Cleaning?

If your dishwasher completes cycles but doesn’t clean dishes, clogged spray arms, a dirty filter, or low water temperature could be the problem. Blocked spray arms restrict water flow, while a dirty filter prevents proper drainage. Ensure water reaches 120°F and check for mechanical issues like a faulty pump.

Why Is My Dishwasher Not Cleaning and Leaving White Residue?

White residue usually results from hard water deposits or excessive dishwasher salt. Using a water softener, adjusting salt levels, and adding rinse aid can help prevent buildup. Regularly descaling the dishwasher and ensuring correct detergent usage improves cleaning performance and prevents stubborn limescale from forming on your dishes.

Why Is My Whirlpool Dishwasher Making Dishes Dirtier?

A Whirlpool dishwasher may leave dishes dirtier due to a clogged filter, blocked spray arms, or incorrect loading. If the filter isn’t cleaned, food particles can recirculate. Ensure dishes face the spray arms, don’t overcrowd the racks, and use the right detergent for optimal cleaning efficiency.

Is It Worth Repairing a Whirlpool Dishwasher?

Repairing is cost-effective if the fix costs less than 50% of a new dishwasher. Minor repairs like unclogging filters or spray arms are worthwhile. However, if the dishwasher has major issues like a failing motor or is over ten years old, replacing it may be a better investment.