Dishwasher Not Cleaning Dishes? 8 Causes (And How to Fix Each)

Finding your dishwasher isn't cleaning dishes as it should can be frustrating. Let’s explore some common causes and straightforward fixes to help you out.

Before you start dismantling anything, check if the problem is consistent across all cycles. Run a different cycle to see if the issue persists.

Start With These 30-Second Checks

1. 1Ensure dishwasher is plugged in and the door is fully closed.
2. 2Check if the water supply valve is turned on.
3. 3Inspect the spray arms for clogs or obstructions.
4. 4Make sure the detergent dispenser isn’t blocked.

1. Clogged Spray Arms

Clogged spray arms are a common reason dishes don't get clean. Food particles can block the tiny holes, reducing water flow.

1. 1Remove the lower and upper spray arms.
2. 2Use a toothpick or wire to clear out any blockages.
3. 3Rinse the arms under running water.
4. 4Reattach the spray arms securely.

2. Improper Loading

Overloading or incorrect arrangement can prevent water from reaching all areas. Proper loading ensures effective cleaning.

1. 1Avoid overcrowding by keeping space between dishes.
2. 2Place larger items at the sides or back.
3. 3Ensure nothing blocks the detergent dispenser.
4. 4Angle dishes to allow water to run off.

3. Incorrect Detergent Use

Using too much or the wrong type of detergent can leave residues, affecting cleaning performance.

1. 1Use a detergent recommended by the manufacturer.
2. 2Adjust the amount based on water hardness.
3. 3Avoid using regular dish soap.
4. 4Occasionally clean the detergent dispenser.

4. Filter Needs Cleaning

A clogged filter can hinder water flow, reducing cleaning efficiency. Regular cleaning keeps the filter clear.

1. 1Locate the filter at the bottom of the dishwasher.
2. 2Twist it counterclockwise to remove.
3. 3Rinse it under warm water to remove debris.
4. 4Reinstall the filter securely.

5. Faulty Inlet Valve

The inlet valve controls water entry. If it’s defective, the dishwasher might not fill properly.

1. 1Turn off the power and water supply.
2. 2Locate the inlet valve behind the lower panel.
3. 3Test the valve with a multimeter for continuity.
4. 4Replace if faulty.

6. Malfunctioning Circulation Pump

If the dishwasher still doesn’t clean well, the circulation pump might be failing. This is more complex and may require professional help.

1. 1Disconnect power and water supply.
2. 2Access the pump under the dishwasher.
3. 3Check for blockages or wear.
4. 4Consult a professional if replacement is needed.