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Repairing a Dishwasher with a Broken Drain Pump: A DIY Tutorial

Repairing a dishwasher with a broken drain pump can be a daunting task, but with the right knowledge and tools, it is possible to fix the issue yourself. A malfunctioning drain pump can cause water to accumulate in the dishwasher, leading to poor cleaning performance and potential damage to the appliance. In this comprehensive guide, we will walk you through the step-by-step process of repairing a dishwasher with a broken drain pump. From diagnosing the problem to replacing the faulty pump, we will cover everything you need to know to get your dishwasher back in working order.

1. Diagnosing the Problem

The first step in repairing a dishwasher with a broken drain pump is to diagnose the problem. There are several signs that indicate a faulty drain pump:

  • Water not draining from the dishwasher
  • Standing water in the bottom of the dishwasher
  • Unpleasant odor coming from the dishwasher
  • Noise or vibration during the drain cycle

If you notice any of these symptoms, it is likely that your dishwasher’s drain pump is malfunctioning. However, before jumping to conclusions, it is important to rule out other possible causes such as clogged drain hoses or a faulty control board. By carefully inspecting the dishwasher and performing some simple tests, you can confirm whether the drain pump is indeed the culprit.

2. Gathering the Necessary Tools and Parts

Once you have confirmed that the drain pump is the cause of the problem, the next step is to gather the necessary tools and parts for the repair. Here are some common tools you may need:

  • Screwdriver set
  • Adjustable wrench
  • Needle-nose pliers
  • Multimeter
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In addition to the tools, you will also need to purchase a replacement drain pump for your specific dishwasher model. It is important to ensure that you buy the correct pump to avoid compatibility issues. You can find the model number of your dishwasher on the inside of the door or on the back of the appliance. Once you have the model number, you can search for a compatible drain pump online or visit a local appliance parts store.

3. Disconnecting the Dishwasher

Before you can start working on the dishwasher, it is crucial to disconnect it from the power source and water supply. This will ensure your safety and prevent any potential damage to the appliance. Here are the steps to follow:

  1. Turn off the dishwasher by unplugging it from the electrical outlet or switching off the circuit breaker.
  2. Locate the water supply valve under the sink and turn it off to stop the flow of water to the dishwasher.
  3. If your dishwasher is hardwired, you will need to turn off the power at the main electrical panel.

Once you have disconnected the dishwasher, you can proceed with the repair process without any risk of electric shock or water damage.

4. Removing the Old Drain Pump

With the dishwasher safely disconnected, you can now begin removing the old drain pump. Here are the general steps to follow:

  1. Open the dishwasher door and locate the lower spray arm. Remove it by unscrewing the retaining nut or releasing the clips, depending on the model.
  2. Next, remove the lower dish rack to gain access to the bottom of the dishwasher.
  3. Inspect the area around the drain pump to identify any screws or clips holding it in place. Use a screwdriver or pliers to remove these fasteners.
  4. Once the drain pump is free from any attachments, carefully pull it out from the dishwasher. Be cautious not to damage any surrounding components.
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It is important to note that the exact steps may vary depending on the make and model of your dishwasher. Consult the user manual or online resources specific to your appliance for detailed instructions.

5. Installing the New Drain Pump

Now that you have removed the old drain pump, it is time to install the new one. Follow these steps:

  1. Take the new drain pump and position it in the same location where the old pump was removed. Ensure that it is aligned correctly and securely fits into place.
  2. Reattach any screws or clips that were removed during the removal process to secure the new drain pump in place.
  3. Replace the lower dish rack and reattach the lower spray arm.
  4. Reconnect the dishwasher to the power source and water supply by reversing the steps outlined in the “Disconnecting the Dishwasher” section.

Once you have completed the installation, it is important to test the dishwasher to ensure that the new drain pump is functioning properly. Run a cycle and observe if the water drains correctly without any issues. If everything is working as expected, congratulations! You have successfully repaired your dishwasher’s broken drain pump.


Repairing a dishwasher with a broken drain pump is a task that can be accomplished by DIY enthusiasts with the right knowledge and tools. By following the steps outlined in this comprehensive guide, you can diagnose the problem, gather the necessary tools and parts, disconnect the dishwasher, remove the old drain pump, and install the new one. Remember to always prioritize safety by disconnecting the dishwasher from the power source and water supply before starting any repair work. With a little patience and effort, you can save money on professional repairs and enjoy a fully functional dishwasher once again.

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