Bosch Dishwasher E24 Error Code: Easy Fix Guide

Introduction 

The Bosch dishwasher E24 error code means the dishwasher is not draining water properly. This issue is usually caused by a clogged filter, blocked drain hose, or debris stuck in the drain pump. In some cases, incorrect installation or a loose pump cover can also trigger the error.

The good news is that most E24 errors can be fixed at home with a few simple troubleshooting steps. 

What Does the Bosch E24 Error Mean?

The E24 error code on a Bosch dishwasher indicates a drainage problem. When this code appears, the appliance cannot remove wastewater correctly during or after a wash cycle.

You may also notice:

• Water is sitting at the bottom of the dishwasher
• Slow draining after cycles
• Gurgling or humming sounds
• Dishes are not cleaning properly
• Bad odors from trapped water

In many cases, the issue is linked to a blockage somewhere in the dishwasher’s drainage system.

Most Common Causes of Bosch E24 Error

1. Dirty or Clogged Filter

The dishwasher filter traps food particles and debris. Over time, grease and food buildup can restrict water flow and trigger the E24 code.

2. Blocked Drain Hose

A kinked or clogged drain hose can stop wastewater from leaving the dishwasher properly.

3. Drain Pump Obstruction

Broken glass, food debris, or small objects can block the drain pump impeller and prevent draining.

4. Loose or Damaged Pump Cover

If the pump cover is not fitted correctly, the drain pump may not work efficiently.

5. Air Gap or Garbage Disposal Blockage

A clogged air gap or disposal connection can force water back into the dishwasher.

6. Installation Issues on New Dishwashers

For newly installed Bosch dishwashers, the E24 error is often caused by:

• Incorrect high loop installation
• Air gap connection problems
• Garbage disposal knockout plug not removed

How to Fix Bosch Dishwasher E24 Error

Step 1: Clean the Dishwasher Filter

The filter is located at the bottom of the dishwasher tub.

Follow these steps:

1. Turn off the dishwasher.
2. Remove the bottom dish rack.
3. Take out the spray arm if necessary.
4. Twist and lift the filter out.
5. Wash the filter with warm water and mild soap.
6. Remove any debris from the filter housing.
7. Reinstall the filter securely.

A clogged filter is the most common reason for the E24 error and should always be checked first.

Step 2: Inspect the Drain Pump

If cleaning the filter does not solve the issue, inspect the drain pump.

1. Remove the filter again.
2. Locate the pump cover beneath the filter area.
3. Carefully unclip the cover using a spoon or small tool.
4. Wear gloves to protect your hands from sharp debris.
5. Remove food particles, glass, or blockages.
6. Check that the impeller spins freely.

If the impeller feels stuck or damaged, the drain pump may need replacement.

Step 3: Check the Drain Hose

A bent or blocked hose can stop water from draining.

1. Pull the dishwasher forward carefully.
2. Inspect the drain hose behind the unit.
3. Straighten any kinks.
4. Disconnect the hose if needed.
5. Flush it with hot water or use a drain cleaning tool.

If your dishwasher uses a high loop installation, make sure the hose remains elevated properly to prevent backflow.

Step 4: Clean the Dishwasher Internally

Grease buildup inside the dishwasher can reduce drainage performance over time.

To deep clean the dishwasher:

1. Place one cup of white vinegar in a dishwasher-safe bowl.
2. Put the bowl on the top rack.
3. Run a hot wash cycle without dishes.
4. Sprinkle baking soda inside afterward.
5. Run a short hot cycle again.

This process helps remove odors, grease, and minor drainage blockages.

How to Access the Drain Pump and Hose

If the blockage cannot be reached from inside the dishwasher:

1. Disconnect power to the dishwasher.
2. Shut off the water supply.
3. Remove the lower front kick plate screws.
4. Locate the drain pump and drain hose underneath.

Place towels underneath before disconnecting hoses because water may spill out.

When the Drain Pump Needs Replacement

The drain pump may need replacement if:

• The impeller does not spin freely
• The pump makes loud grinding noises
• The dishwasher still will not drain after cleaning
• Electrical continuity tests fail

A defective drain pump may also trigger an E25 error code on some Bosch dishwasher models.

Common Installation Mistakes

Many new Bosch dishwasher owners see the E24 code shortly after installation.

The most common reasons include:

Incorrect High Loop

The drain hose must be installed above the dishwasher base level to prevent backflow.

Air Gap Misalignment

Loose drain connections can restrict water flow.

Knockout Plug Still Installed

If connected to a garbage disposal, the knockout plug must be removed before use.

These installation issues are extremely common and are often overlooked during setup.

How to Clear the Error Code

After fixing the drainage issue, reset the dishwasher.

Most Bosch dishwashers can be reset by:

• Pressing and holding the Start button for 3–5 seconds
• Using the Cancel/Drain buttons depending on the model

You can also try starting a cycle, waiting one minute, then opening and closing the door quickly before restarting.

Tips to Prevent Bosch E24 Error

Keep Your Dishwasher Draining Properly

Regular maintenance can help prevent future drainage problems.

Best Practices

• Clean the filter regularly
• Rinse large food debris from dishes
• Avoid overloading the dishwasher
• Use the correct detergent amount
• Run a monthly cleaning cycle
• Inspect hoses for buildup or kinks

Simple maintenance can extend the lifespan of your dishwasher and improve cleaning performance.

Conclusion

The Bosch E24 error is usually caused by a drainage blockage, such as a dirty filter, clogged hose, or blocked drain pump. Most issues can be fixed with simple cleaning and maintenance without professional repair. 

FAQs

Can hard water cause an E24 error on my dishwasher?

Yes, hard water can cause mineral buildup inside the filter, drain hose, and pump, leading to drainage problems. Over time, this buildup may trigger the E24 error code. 

How do I fix an E24 error on a Bosch dishwasher?

Start by cleaning the filter and checking the drain hose and drain pump for blockages. If the issue continues, inspect the air gap, garbage disposal connection, or reset the dishwasher. 

Is there a filter I need to clean for the E24 error?

Yes, the dishwasher filter located at the bottom of the tub should be cleaned regularly. A clogged filter is one of the most common causes of the Bosch E24 error.