KitchenAid KDTM404KPS Dishwasher Not Cleaning Properly

Troubleshooting Guide: KitchenAid KDTM404KPS Dishwasher Cleaning Issues

The KitchenAid KDTM404KPS 360° Max Jets™ Third Rack Dishwasher is built for high performance, but like any appliance, cleaning issues can arise. Here’s a clear, structured guide to fix the most common cleaning complaints:

1. Check and Clean the Filter Assembly

Location: Bottom of the tub, under the lower spray arm.
Steps:
1. Remove the bottom rack.
2. Twist and lift out the cylindrical filter.
3. Rinse under warm water and use a soft brush to remove food debris.
4. Reinstall securely.

Part Number: W11368488 – Fine filter assembly for KDTM404KPS

2. Inspect and Clean the Spray Arms

Problem: Spray arms clogged with food particles or hard water deposits.
Steps:
1. Remove the lower and upper spray arms by gently lifting or unscrewing.
2. Rinse under running water.
3. Use a toothpick or wire to clear blocked holes.
4. Reattach securely.

Replacement Part: W11550888 – Lower spray arm assembly

3. Ensure Proper Loading

Problem: Overloading or incorrect placement of dishes.
Tip: Avoid blocking the spray arms and jets. Do not stack dishes or bowls too tightly.

4. Use the Correct Detergent

Problem: Poor detergent quality or too much/too little detergent.
Solution: Use a high-quality detergent specifically designed for automatic dishwashers. Consider using Finish Quantum or Cascade Platinum.

5. Verify Water Temperature

Optimal Temperature: 120°F (49°C)
Run hot water in the sink before starting the dishwasher to ensure hot water reaches the appliance immediately.

6. Check Water Inlet Valve

If the dishwasher isn’t filling properly:

Inspect the Water Inlet Valve (Part Number W11175771) for signs of clogging or failure.
Replace if needed.

7. Run Diagnostic Mode

You can enter diagnostic mode to check for stored error codes:

Press the following button sequence quickly: Heated Dry → Normal → Heated Dry → Normal.
The dishwasher will run a self-test cycle and display error codes if present.