The Bosch dishwasher drain pump is a crucial component of your dishwasher’s drainage system. It plays a vital role in removing the used water from the dishwasher’s interior, allowing for clean and efficient washing cycles. When the dishwasher completes its washing cycle, the drain pump is responsible for expelling the dirty water, food particles, and debris out of the dishwasher and into your home’s drainage system.

This pump plays a vital role in ensuring that your dishwasher effectively removes dirty water after the washing and rinsing cycles, leaving your dishes clean and dry.

Here’s How The Bosch Dishwasher Drain Pump Works:

  1. Drain Cycle Initiation: At the end of a wash or rinse cycle, your dishwasher enters the drain cycle. This is when the drain pump comes into action.
  2. Water Extraction: The drain pump draws water from the dishwasher’s interior, including the wash and rinse compartments, as well as any residual water in the sump.
  3. Flow Direction: The pump forces the water through a hose or pipe, leading it out of the dishwasher’s interior. This hose is typically connected to your home’s plumbing system or a designated drainage point.
  4. Effective Drainage: As the pump expels water, it creates a vacuum-like effect that helps remove all remaining water from the dishwasher’s interior, including food particles and debris.
  5. Cycle Completion: Once the drain pump has effectively removed all water, the dishwasher cycle is complete, and the appliance is ready for the next use.

Bosch Dishwasher Drain Clogged/blocked

A clogged drain in your Bosch dishwasher can lead to drainage issues, unpleasant odors, and poor cleaning results. Here’s how to troubleshoot and address a clogged drain in your Bosch dishwasher:

1. Check for Visible Debris:

2. Clean the Filter:

  • Bosch dishwashers typically have a filter located at the bottom of the dishwasher tub. Remove the lower rack and access the filter. Depending on your model, you may need to unscrew or twist the filter assembly to access it.
  • Remove the filter and rinse it under running water to remove any food debris or residue. Use a soft brush or toothbrush to scrub away stubborn particles.
  • Once the filter is clean, reassemble it and ensure it is properly seated.

3. Check the Drain Hose:

  • Inspect the drain hose, which is usually located under the sink and connected to the dishwasher’s drain pump. Ensure that it is not kinked, pinched, or damaged in any way. A damaged hose may need to be replaced.

4. Unclog the Air Gap (If Applicable):

5. Clean the Drain Pump:

  • In some cases, debris or foreign objects may accumulate in the drain pump, causing a blockage. The drain pump is usually located in the bottom of the dishwasher.
  • Disconnect power to the dishwasher by unplugging it or switching off the circuit breaker.
  • Remove the lower access panel at the front of the dishwasher (if applicable). You may need to remove a few screws to access the pump area.
  • Once you have access to the drain pump, carefully inspect it for debris and remove any obstructions. Use needle-nose pliers or a small tool if necessary.
  • Reassemble the access panel and restore power to the dishwasher.

6. Run a Test Cycle:

  • After performing these cleaning and maintenance steps, run a test cycle on your Bosch dishwasher to check if the drainage issue is resolved. Place a small container on the lower rack to catch any water that may remain during the test cycle.

Step-by-Step Process of Replacing the Drain Pump in your Dishwasher

How to Replace an Integrated Dishwasher Drain Pump
Replacing the Drain Pump on a Dishwasher

Step 1: Preparing for the Repair

  • Use a turkey baster or sponge to remove excess water from the sump.
  • Ensure the area is dry to prevent water spills during pump replacement.
  • Turn off the power by unplugging or switching off the breaker.

Step 2: Accessing the Pump Area

  • Use a Phillips head screwdriver to remove the bottom panel (two screws).
  • Locate the silver panel beneath held by two Phillips head screws (or Torx 15 screws).

Step 3: Removing the Front Panel

Bosch Dishwasher Error Code E15: How to Fix It
Front Panel
  • Remove the front panel by unscrewing six Torx 15 screws from the inside of the door.
  • Gently pull down the front panel to release it.

Step 4: Removing the Drain Pump

How To Replace a Dishwasher Pump Motor
Removing the Drain Pump
  • Locate the white part of the drain pump.
  • Disconnect the wire harness and unclip the pump.
  • Push up the tab behind the pump and turn it clockwise to about 2 o’clock.
  • Wiggle and pull the pump away from the dishwasher to remove it.

Step 5: Installing the New Pump

  • Check the new pump for debris and clear the housing.
  • Fit the new pump in, tilting it to about 2 o’clock.
  • Push and turn the pump counterclockwise to lock it into position.
  • Reconnect the wire harness.

Step 6: Finalizing the Replacement

  • Install the cover over the impeller.
  • Restore power by plugging in or turning on the breaker.
  • Put the filter back in and lock it into position.
  • Reinsert the spray arm and ensure it’s securely in place.
  • Close the door, turn on the power, and confirm proper drainage.

Step 7: Reassembling the Dishwasher

Step 8: Quick Maintenance Tip

  • Clean the filter and impeller area periodically to prevent future issues.


Following these instructions diligently ensures not only the successful replacement of the drain pump but also the maintenance of the dishwasher’s efficiency. It’s important to exercise caution and precision during each step to ensure a safe and effective repair, allowing you to enjoy a fully functional Bosch dishwasher once again.

Frequently Asked Question

Why is my Bosch dishwasher not draining?

A faulty drain pump could be causing the issue. Follow our guide to replace it.

Do I need any special tools for this repair?

No, a Phillips head screwdriver and possibly Torx 15 screws are all you need.

How can I ensure I install the new pump correctly?

Follow the step-by-step instructions carefully and take your time.

Is pump replacement a common Bosch dishwasher issue?

While Bosch pumps are generally reliable, occasional replacements may be needed.

Key Takeaways:

  • Replacing the drain pump in your Bosch dishwasher is an achievable DIY task.
  • Properly prepare the area, turn off power, and follow each step meticulously.
  • Ensure the new pump is correctly installed to avoid future drainage problems.
  • Regular maintenance can prevent issues and keep your dishwasher running smoothly.

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