How to Replace Bosch Dishwasher Drain Pump: Your Quick Step-by-Step Guide

If you own a Bosch dishwasher, you know it's a reliable and efficient appliance.

However, as with any appliance, there may come a time when you face an issue with its functioning.

A Bosch dishwasher installed in the kitchen

One common problem is a faulty drain pump, which can disrupt your dishwasher's ability to drain water properly.

In this article, we'll provide a clear, step-by-step guide to help you navigate the process of replacing your Bosch dishwasher's drain pump.

By following these instructions, you'll be well on your way to fixing your dishwasher and getting back to enjoying its convenience in no time.

Where is the Drain Pump On Bosch Dishwasher?

First, locate the kickplate panel, typically at the dishwasher's bottom front.

Bringing your attention to this area, you will find the drain pump behind this kickplate, which is mounted on the sump assembly underneath the dishwasher.

An opened Bosch dishwasher in the kitchen

The drain pump is visibly identifiable due to its circular shape and the presence of two wires connected to it.

You can follow the drain hose from the dishwasher to the pump to help you locate it more easily.

What Does the Dishwasher Drain Pump Do?

The dishwasher drain pump plays a crucial role in the dishwashing process. Its primary function is to remove wastewater from your dishwasher after a wash cycle.

The drain pump ensures that dirty water doesn't linger in your appliance, ensuring that your dishes come out clean and hygienic.

To better understand the dishwasher drain pump, think of it as the heart of the wastewater removal system.

After the dishwasher completes a wash cycle, the pump activates and pushes water toward the drainage hose.

The process prevents residue buildup inside the dishwasher, which could lead to unpleasant odors or malfunctions.

Part I: Removing Bosch Dishwasher Drain Pump [Step by Step]

Before diving into the steps, ensure you have the necessary tools and a replacement drain pump on hand. You'll need the following:

  • Sponge or towel
  • Small bucket or container
  • Screwdriver
  • Gloves
  • Drill

Step 1: Turn Off the Power and Empty the Dishwasher

Before attempting any maintenance on your dishwasher, it's important to prioritize your safety.

To do so, start by turning off the power supply and unplugging the dishwasher.

Bosch dishwasher filled with lots of newly washed dishes

Once you've done this, it's time to prepare the dishwasher for maintenance. Remove all dishes, utensils, and racks to make it easier to access the drain pump.

If you notice any standing water in the dishwasher, be sure to empty it using a small container and a sponge to avoid any potential leaks when removing the drain pump.

Step 2: Prepare Dishwasher

To better access the dishwasher drain pump, it's best to pull the dishwasher out from under the counter.

Carefully slide it forward to avoid any damage to the hose connections or electrical wiring.

If the dishwasher's hose length limits your ability to move it, you might need to disconnect the water supply temporarily.

Step 3: Disassemble Top Panel

With the dishwasher in position, remove the top panel. Typically, you'll find two screws at the rear holding it in place. Go ahead and remove these screws carefully.

An opened dishwasher

Once they're out, set the panel aside – you'll need it when it's time to put everything back together.

A handy tip here is to keep those screws close to each component you're removing. This way, you'll easily remember which ones belong where during reassembly.

Step 4: Remove Side Panels

Next, you'll need to detach the side panels of the dishwasher.

Begin by locating and unscrewing the screws that secure the side panels.

Typically, you'll find two screws in the front; in some models, there might be an additional two at the back.

Once you've successfully removed these screws, gently set aside the panels in a safe spot.

Step 5: Take Off the Front Door Panel

Unscrew the front door panel at the top and bottom edges.

While doing so, ensure that you're cautious not to allow the door panel to fall onto the floor during the process.

Carefully lift and remove the panel, revealing the internal components.

Also read: How To Replace A Bosch Dishwasher Front Panel

Step 6: Remove Kick Strip

At the bottom of the dishwasher, locate and remove the kick strip (also known as the toe kick) by unscrewing it.

Opened dishwasher

Specifically, this component is situated right underneath the door area.

Depending on the model, you might need to unscrew two screws or gently unclip it from its position.

By removing the kick strip, you will expose the base of the dishwasher.

Step 7: Remove the Cover Plate

Locate the cover plate that serves to safeguard the drain pump area.

To gain access to the drain pump, unscrew the screws that secure the cover plate to the dishwasher frame.

Once these screws are removed, you can gently pull the cover plate upwards and then out to unclip it from its position.

With the cover plate successfully detached, you will now have the necessary access to the drain pump.

Step 8: Remove the Water Detection Sensor

Carefully disconnect the water detection sensor by detaching its wiring harness. Be gentle to avoid causing any damage.

Step 9: Unclip Drain Pump

Now, locate the drain pump and unclip it to disengage it from the dishwasher.

Dishwasher drain clean

Turn the drain pump clockwise to release it from its housing effectively.

Step 10: Disconnect Electric Plugs

Finally, disconnect all electric plugs connected to the drain pump. In some models, you may need to release the locking mechanism to detach them.

Take note of the placement of these connections for easier reassembly.

Now you have successfully removed the drain pump from your Bosch dishwasher!

The following section will guide you through replacing the drain pump and reassembling your dishwasher.

Part II: Installing the New Bosch Dishwasher Drain Pump [Step by Step]

Now that you've removed the old drain pump, it's time to install the new one. Follow these simple steps to have your Bosch dishwasher up and running again.

Step 1: Install New Drain Pump

Gently position the replacement drain pump within its designated housing, ensuring it aligns precisely with the mounting points to prevent any potential leaks from occurring.

Proceed by carefully turning the drain pump counterclockwise until it securely clips into place within the housing.

Step 2: Reconnect Wires

Attach the wires to the new drain pump, ensuring they are connected tightly and properly.

Technician checking the dishwasher

If you documented the wire connections earlier, refer to your notes for the correct wiring.

Step 3: Test the Dishwasher

Before reassembling the dishwasher fully, it's a good idea to test it.

Plug in the dishwasher and turn it on, running a short cycle to confirm that the new drain pump is working correctly and no leaks are present.

Continue reading: How To Start A Bosch Dishwasher

Step 4: Reassemble the Dishwasher

Once you're sure everything is working correctly, and there are no error messages on the control screen, you can reassemble the dishwasher.

How To Clear Error Messages On A Bosch Dishwasher [Inc. E15, E22, E24, E25]

Step 5: Reattach Cover Plate

Begin the reassembly by affixing the cover plate over the drain pump.

To secure it in position, utilize the two screws that were previously removed.

Carefully insert them to ensure the cover plate is fastened correctly. Additionally, ensure that the bottom part of the cover plate clips securely back into place.

Step 6: Reattach Kick Strip

Next, refit the kick strip at the bottom of the dishwasher, lining up the tabs and snapping it back into place.

Step 7: Reattach Front Door Panel

Carefully slide the front door panel back onto the dishwasher, ensuring the edges line up correctly. Secure it using the original screws.

Step 8: Reattach Side Panels

Position the side panels back onto the dishwasher and secure them using the screws you had removed.

Step 9: Reattach Top Panel

Finally, place the top panel back onto the dishwasher and utilize the screws to secure it firmly in place.

With this step completed, the dishwasher should now be fully reassembled and ready for the final step.

Final Step: Restart the Bosch Dishwasher

Before you start enjoying your efficient, newly repaired appliance, there's one last step: restarting your dishwasher.

First, make sure you have reassembled everything correctly. Double-check that you've connected all the necessary wires and hoses.

Once you're confident that everything is back in place, it's time to restore power to your dishwasher.

Plug it in or turn the circuit breaker back on. This should wake up your Bosch dishwasher and prepare it for a new cycle.

Now, let's run a test cycle to ensure that your dishwasher is working properly. Start by selecting a short cycle, like a rinse only.

Close the door firmly, and press the "Start" button.

Keep an ear out for any unusual noises or signs of trouble. If everything sounds normal, then you've successfully replaced your dishwasher's drain pump! 

You might also like: How To Reset A Bosch Dishwasher

What to Do If Bosch Dishwasher Doesn’t Drain Water

If your Bosch dishwasher is not draining water properly, it's likely that something along the drainage pathway is either blocked or clogged with debris.

Learn more about the issue by following this article: Bosch Dishwasher Doesn’t Drain – How To Reset The Drain

Below, we've outlined a few troubleshooting steps you can take to resolve the issue. 

Clean the Filter

First and foremost, you should clean the dishwasher's filter.

Remove the filter by following the instructions in your owner's manual, and then gently clean it with soap and a soft brush under running water.

Make sure to remove any trapped debris or objects to allow for proper drainage.

Check for Clogs or Damage in the Air Gap

The air gap is a small device typically found on the top of your sink, and its purpose is to prevent the backflow of water into the dishwasher.

If there's a clog or damage present, it could cause the dishwasher not to drain properly.

To check for issues, remove the air gap cap and clean out any debris. If the air gap is damaged, consider replacing it.

Unclog the Drain Hose

Lastly, it's essential to unclog the drain hose.

Disconnect the hose from the dishwasher and inspect it for any blockages or damage. If you find obstructions, try to clear them using a sponge or a stiff brush.

Related content: Why Are There Two Drain Hoses On A Bosch Dishwasher?

Wrapping Up

Now that you've learned how to replace a Bosch dishwasher drain pump, you can confidently tackle this DIY project on your own.

Remember to gather all your required tools and follow the step-by-step guide to ensure a smooth process.

Your Bosch dishwasher will be back up and running in no time!

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