KitchenAid Dishwasher Not Draining [Quick Fixes]

Is your KitchenAid dishwasher not draining like it should? Nothing’s more frustrating than opening the door after a wash cycle and finding standing water at the bottom. It’s messy, inconvenient, and can leave you wondering what went wrong.

A dishwasher is supposed to make life easier, not harder. When water doesn’t drain properly, it could mean anything from a simple clog to a more serious appliance issue. The good news? Most drainage problems can be fixed without calling in a technician.

In this guide, I’ll walk you through the common reasons your KitchenAid dishwasher isn’t draining and how to tackle them step by step. Whether it’s a clogged drain hose or an issue with the garbage disposal, I’ve got you covered.

What Are the Symptoms of Not Draining Dishwasher?

A not-draining dishwasher often shows clear signs that something’s wrong. Here are the most common signs that your dishwasher isn’t draining properly:

• Standing water at the bottom: After the wash cycle ends, you might notice a pool of water in the dishwasher. Even a small amount can indicate a blockage or malfunction.
• Slow draining: Water lingers longer than usual during or after the wash cycle, signaling a possible clog in the drain hose or garbage disposal.
• Foul odors: A buildup of trapped food particles and dirty water can cause unpleasant smells coming from your dishwasher.
• Gurgling sounds: Strange noises during draining often point to a blockage in the drain hose or air gap cylinder.
• Dirty dishes after a cycle: If water isn’t draining properly, leftover food and detergent can stay on dishes, leaving them grimy.

Quick Causes and Fixes for a Non-Draining KitchenAid Dishwasher

Here’s a quick reference table with common causes and fixes for a KitchenAid dishwasher not draining:

How Do I Fix a Kitchenaid Dishwasher That Doesn’t Drain?

Here are the things you can do to fix a non-draining KitchenAid dishwasher:

Check the Appliance Filter

One of the most common reasons a KitchenAid dishwasher isn’t draining is a clogged filter. The filter traps food particles and debris to prevent them from entering the drain system. Over time, these particles can build up and block water flow, leaving standing water at the bottom of the dishwasher.

To check and clean the filter, follow these steps:

1. Open the dishwasher door and pull out the lower dish rack to access the bottom of the dishwasher.
2. If needed, remove the lower spray arm to get a clear view of the filter.
3. Locate the filter—it’s usually found at the bottom center of the tub.
4. Depending on your dishwasher model, twist the filter counterclockwise to unlock and remove it.
5. Rinse the filter under running water, using a soft brush to clear away debris.
6. Place the filter back and secure it by twisting it clockwise until it locks.

Regular filter cleaning can help prevent clogs and ensure your dishwasher drains effectively.

Clean the Sump Area

If cleaning the filter doesn’t solve the problem, the next step is to inspect and clean the sump area. The sump collects water during the wash cycle and directs it toward the drain hose. Food particles, glass, or other debris can block this area, stopping your dishwasher from draining properly.

Here’s how to clean the sump:

1. Disconnect the dishwasher from power for safety.
2. Use a container or a wet vacuum to scoop the water from the bottom of the dishwasher.
3. Remove the filter, screen filter, and pump cover to access the sump.
4. Check for debris like food chunks or glass and clear any blockages.
5. If accessible, inspect the pump impeller to ensure it isn’t jammed.

Inspect the Garbage Disposal or Air Gap

If your KitchenAid dishwasher is connected to a garbage disposal, a blockage in the disposal could be preventing proper drainage. Food debris can clog the disposal, obstructing water flow and causing standing water in the dishwasher. Additionally, if the disposal was recently installed, the knockout plug inside the disposal might not have been removed, which can block the drain hose connection.

Here’s how to inspect and clear the garbage disposal and air gap:

1. Clean the garbage disposal thoroughly to remove any trapped food particles.
2. Use a non-toxic drain cleaner to break down any stubborn clogs.
3. Check if the knockout plug has been removed by disconnecting the drain hose from the disposal connection.
4. If the disposal isn’t causing the issue, locate the air gap cylinder—usually found near the sink faucet.
5. Remove and clean the air gap to eliminate any debris buildup and ensure it’s reinstalled securely for a proper seal.

Inspect the Check Valve

The check valve plays a key role in ensuring that drained water doesn’t flow back into your dishwasher. It opens during draining and closes afterward to prevent dirty water from re-entering the tub. If the valve is stuck or damaged, it can stop water from draining effectively.

To inspect the check valve:

1. Find the valve inside the tub, typically under a small cover near the sump area.
2. Remove the cover and verify that the valve can open and close freely.
3. If it’s stuck or broken, replacing the valve is necessary to restore proper drainage.
4. In some models, the check valve may be located where the drain hose connects to the pump. Check this area for blockages or signs of damage.

Check the Drain Hose

A clogged or improperly installed drain hose can prevent your KitchenAid dishwasher from draining effectively. The hose should be installed with a high loop—typically at least 20 inches above the floor—to stop wastewater from flowing back into the appliance. If this loop isn’t present or the hose is obstructed, water may remain trapped inside the dishwasher.

Follow these steps to inspect the drain hose:

1. Disconnect the power to ensure safety before beginning any inspection.
2. Check the hose connection under the sink. Detach it and look for blockages where it connects to the drainpipe.
3. Remove the kickplate at the front of the dishwasher to access the internal hose connection.
4. If necessary, lay the dishwasher on its back to fully inspect the drain hose. Disconnect it from the drain pump and clear any visible debris.
5. Inspect for a faulty check valve attached to the hose, which could also cause draining issues.

Clearing the hose and ensuring it’s properly looped can often resolve drainage problems without needing further repairs.

Check the Drain Pump

If the drain hose isn’t the issue, the problem might lie with the drain pump. This component pushes water out of the dishwasher during the drain cycle. A blockage in the impeller—the small fan inside the pump—or a pump failure can prevent the appliance from draining properly.

Here’s how to inspect the drain pump:

1. Disconnect the dishwasher from the power source for safety.
2. Access the pump by removing the kickplate or, if necessary, laying the dishwasher on its back.
3. Examine the impeller inside the pump. It should spin freely without obstruction. If it’s jammed, clean out any debris.
4. Remove the pump and use a multimeter to test for continuity. A lack of continuity suggests the pump is faulty and requires replacement.
5. Reinstall or replace the pump as needed to restore proper drainage.

Check the Drain Solenoid

Some KitchenAid dishwashers use a drain solenoid valve that controls the release of water during the drain cycle. When functioning correctly, the solenoid activates to open the drain valve, allowing water to exit. However, if the solenoid fails, it can prevent the dishwasher from draining entirely.

To determine if the drain solenoid is the issue, follow these steps:

1. Disconnect the power to the dishwasher for safety.
2. Locate the solenoid, typically near the drain pump or attached to the motor assembly. Consult your user manual for exact placement.
3. Use a multimeter to test for continuity. A functioning solenoid should show a continuous electrical path.
4. If the solenoid doesn’t have continuity, it’s likely defective and will need to be replaced.
5. Once replaced, ensure all connections are secure and restore power to test if the dishwasher drains correctly.

When Should I Seek Professional Assistance?

If your dishwasher still won’t drain after basic checks, it might be time to call a professional. Some issues are too complex to fix without expert help.

You should get professional assistance if:

1. You’ve Tried All Basic Fixes: If you’ve checked the drain hose, pump, and solenoid and the problem isn’t solved, there could be a deeper issue, like a broken motor or control board.
2. You Suspect Electrical Problems: If your dishwasher won’t start, trips the breaker, or shows error codes, a professional should check the wiring and electrical parts.
3. Water Still Won’t Drain: If water stays in the bottom after you’ve tried fixing it, the internal drain system could be damaged and need expert repair.
4. Strange Noises or Smells: Unusual sounds or bad smells might mean the pump or motor is failing and needs replacement.

A trained KitchenAid technician can handle these issues safely and help keep your warranty valid.

How Do I Prevent Drainage Issues In the Future?

To keep your KitchenAid dishwasher draining properly, regular maintenance is essential. Simple habits can help avoid clogs and costly repairs.

1. Scrape Off Food Debris: Before loading dishes, scrape off large food particles. While the dishwasher can handle small bits, too much debris can block the filter or drain hose over time.
2. Clean the Filter Regularly: The filter traps food particles and grease. Remove and rinse it under warm water every few weeks to keep the drain clear and improve cleaning performance.
3. Inspect the Drain Hose: Check the drain hose for kinks, clogs, or improper installation. Make sure the hose has a loop at least 20 inches above the floor to prevent backflow.
4. Run Hot Water Before Starting: Letting hot water run from your sink before starting a cycle helps dissolve grease and soap scum, which can build up and block the drain.
5. Use the Right Detergent: Using the correct dishwasher detergent prevents soap buildup, which can clog internal parts. Always follow the manufacturer’s recommendations.
6. Schedule Routine Maintenance: An annual inspection by a professional can help detect early signs of wear or hidden blockages, keeping your dishwasher running smoothly.

Conclusion

If your KitchenAid dishwasher isn’t draining, don’t worry—most issues can be resolved with basic troubleshooting. From cleaning the filter and sump area to inspecting the drain hose, these quick fixes can save you from unnecessary repairs.

Remember to check the garbage disposal, air gap, and drain pump for blockages. Addressing these common trouble spots early can keep your dishwasher running smoothly. Regular maintenance, like cleaning the filter and checking the drain hose, helps prevent future drainage problems.

If you’ve tried everything and the water still won’t drain, it may be time to consult a professional. Complex issues, like a faulty motor or control board, often require expert attention.

FAQs

How Do You Run the Drain Cycle on a Kitchenaid Dishwasher?

Press and hold the “Cancel/Drain” button for a few seconds, then close the dishwasher door to activate the draining process. Water should begin draining into the sink. If standing water remains, check for blockages in the filter, drain hose, or garbage disposal connection.

How Do I Know if the Drain Hose Is Kinked or Blocked?

Disconnect the drain hose from both the dishwasher and sink connection. Inspect it for visible kinks and straighten them out. Run water through the hose—if it doesn’t flow freely, clear any blockages using a flexible wire or replace the hose if necessary.

Can Improper Leveling Cause Drainage Issues?

Yes, an uneven dishwasher can cause water to pool in one area, preventing proper drainage. Make sure the appliance is level by adjusting the legs during installation. A balanced dishwasher allows water to flow freely toward the drain, preventing standing water and leaks.

Can Overloading the Dishwasher Cause Drainage Issues?

Yes, overloading limits water flow and can block filters with trapped food particles. This can lead to poor drainage, standing water, or leaks. Avoid overfilling by arranging dishes with enough space between them to allow proper water circulation and prevent drainage problems.