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How to Replace a Dishwasher Drain Pump By Yourself

AZparts Team

Updated on June 26, 2025

10 min read

If your dishwasher isn’t draining properly or making strange noises, it may be time to replace the dishwasher pump. While calling a technician is an option, many homeowners can handle the replacement themselves with the right tools and clear instructions. In this guide, you'll learn how to safely and efficiently replace your drain pump at home—and where to find trusted replacement parts from AZParts.

Signs You Need to Replace Your Dishwasher Drain Pump

A dishwasher that doesn’t drain properly can quickly become a daily inconvenience. In many cases, the issue points to a drain pump failure, especially if other basic components are working fine. Knowing the early signs can help you act fast before the problem worsens:

Water remains at the bottom after a cycle: If water stays in the tub after a wash, your dishwasher is not draining properly. A persistent issue like this often points to drain pump failure, especially if hoses have already been cleared.
Loud or unusual noise during the drain cycle: Grinding or buzzing during draining usually signals unusual noise from a failing pump. Damaged parts inside the pump often cause this drain pump failure.
Dishes come out dirty or soapy: Leftover soap or food after washing may mean the machine isn't draining correctly. Poor rinsing often happens when the drain pump underperforms.
An error code appears on the panel: Codes like E24, OE, or 5E indicate dishwasher not draining issues. These often relate directly to drain pump failure and should be checked.
Burning smell or overheating: If you notice a burning smell, the pump motor may be overheating. This type of drain pump failure needs immediate attention to prevent further damage.

Signs You Need to Replace Your Dishwasher Drain Pump

Damaged parts inside the pump often cause this drain pump failure (Source: AZParts)

Tools and Replacement Parts You’ll Need

To perform a proper repair, you will need both essential tools and the correct dishwasher drain pump replacement parts. Having the right equipment on hand makes the process smoother and helps prevent accidental damage to your appliance.

Here are the common tools to fix a dishwasher:

Phillips-head screwdriver
Flat-head screwdriver
Nut driver (usually 1/4 inch)
Pliers or adjustable wrench
Towels or a shallow tray to catch any water
Torx driver (required for certain models)

In addition to tools, you must also prepare compatible replacement parts. The most important component is the new drain pump motor. You should also check whether a new pump gasket or rubber seal is needed, especially if the old one is cracked or worn out.

For reliable replacements, AZParts offers a wide range of high-quality pump motors and related parts. Their inventory covers many popular brands like Samsung, LG, Whirlpool, and more, helping you find the exact match for your dishwasher with confidence and ease.

Having the right equipment on hand helps prevent accidental damage to your appliance (Source: AZParts)

How to Find Your Dishwasher Model Number

Finding the right model number location on your dishwasher is the first and most important step when searching for compatible replacement parts. Most dishwashers include the model number on a silver or white sticker inside the door. You’ll usually find this label along the doorframe, on the top edge of the tub, or near the control panel. If you can’t locate it there, check behind the lower kick plate or along the side walls of the inner tub.

Most dishwashers include the model number on a white sticker inside the door (Source: AZParts)

Once you’ve located the full model number, you’ll be able to confirm dishwasher compatibility for any part you need to replace. This includes pumps, racks, gaskets, and other internal components. The model number helps ensure a precise pump match, so you avoid ordering the wrong part or damaging your appliance. Keeping this number handy also speeds up repair consultations and makes part lookups easier when shopping with trusted suppliers like AZParts.

Step-by-Step Guide to Replacing a Dishwasher Drain Pump

Replacing a dishwasher drain pump is a task that many homeowners can handle with the proper instructions. This guide will walk you through each step to ensure that you perform the replacement safely and correctly.

Step 1 – Disconnect Power and Water Supply

You should always begin by cutting power and water to your appliance. You must turn off the dishwasher using the control panel or unplug it directly from the outlet. In addition, you need to shut off the water supply valve that connects to the dishwasher. These safety precautions help prevent electrical accidents and water damage during repairs.

You should always begin by cutting power and water to your appliance (Source: AZParts)

Step 2 – Move and Position the Dishwasher

You need to slide the dishwasher out from under the counter to gain proper access. After moving it forward, you should tilt the dishwasher back slightly to expose the bottom area. This position gives you a clear view and helps you understand how to access the bottom panel safely and effectively.

You need to slide the dishwasher out (Source: AZParts)

Step 3 – Remove the Base Plate

You will find a metal or plastic cover at the bottom of the dishwasher. This is called the dishwasher base panel, and it is usually secured with screws. You should use a screwdriver to unscrew the base cover and set it aside. Removing this part gives you access to the drain pump and nearby components.

You should unscrew the base cover and set it aside (Source: AZParts)

Step 4 – Detach the Anti-Flood Sensor (if present)

If your dishwasher includes a flood protection sensor, you must handle it with care. You should disconnect the sensor wire gently to avoid damaging it. This step is important for safe dishwasher parts disassembly, especially in models that include water-level or anti-leak features.

You must handle a flood protection sensor with care (Source: AZParts)

Step 5 – Check the New Pump for a Seal Ring

Before installing the replacement, you should carefully inspect the new part. Make sure the new drain pump comes with a rubber seal or pump gasket to ensure a tight fit. Doing this new drain pump check helps prevent leaks and guarantees proper sealing during operation.

Make sure the new drain pump comes with a rubber seal to ensure a tight fit (Source: AZParts)

Step 6 – Remove the Old Drain Pump

You will need to locate the old drain pump attached at the bottom of the dishwasher. Start by unplugging the connector wires to disconnect the wires from the pump. After that, twist or unclip the unit to remove the faulty drain pump and set it aside.

You will need to remove the old drain pump (Source: AZParts)

Step 7 – Install the New Drain Pump

You can now take the replacement and align it with the mounting slot. Make sure to fit the new pump securely into the correct position. If you’re not sure how to install a dishwasher drain pump, refer to the user manual for guidance. Once in place, reconnect the wires firmly.

In this step, you can take the replacement and align it with the mounting slot (Source: AZParts)

Step 8 – Reattach the Sensor and Base Plate

If your model included a flood sensor, you should reconnect it before closing the unit. Then, place the base cover back and reinstall the base panel by tightening the screws. Finally, you must reconnect the dishwasher to the water supply and plug it back in. After powering it on, run a short cycle to ensure everything works properly.

After that, let’s place the base cover back and reinstall it (Source: AZParts)

Test the Dishwasher After Installation

After installing the new drain pump, you should always run a test cycle to ensure the dishwasher operates correctly. Start by restoring power and water supply to the appliance, then select a short or rinse cycle to begin testing. As the cycle runs, stay nearby and listen for any irregular sounds or interruptions in operation.

During the test, it’s important to check for leaks around the base and under the unit. A leaking pump or loose connection may indicate that the seal ring or gasket is not properly secured. You should also monitor the machine to ensure the dishwasher is draining fully at the appropriate time. If water remains inside the tub or drains slowly, the pump may not be seated correctly or another issue could be present.

Let’s check for leaks around the base and under the unit (Source: AZParts)

FAQ – Common Questions About Drain Pump Replacement

Can I replace a dishwasher pump myself?

Yes, many homeowners can replace a dishwasher drain pump on their own if they have basic tools and follow safety guidelines. The process typically involves disconnecting power and water, removing the base panel, and replacing the faulty part. However, if you're unsure about electrical connections or need help identifying parts, it’s best to consult a technician or refer to your dishwasher’s manual.

How much does a new dishwasher drain pump cost?

The cost of a replacement drain pump depends on the brand and model of your dishwasher. On average, a new dishwasher pump ranges from $30 to $120. Some premium models, such as those from KitchenAid or Electrolux, may cost more due to specialized parts. If you're buying online, make sure the part is compatible with your unit to avoid returns. You can check reliable suppliers like AZParts for affordable and genuine replacements.

How long should a dishwasher pump last?

Under normal use, a dishwasher drain pump can last from 5 to 10 years. The lifespan depends on how frequently you use your dishwasher and whether it's properly maintained. Clogged filters, hard water buildup, and frequent overloading can shorten the life of the pump. Regular cleaning and checking for early signs of wear can help extend the pump’s performance and prevent unexpected failures.

What if my dishwasher still doesn't drain?

If your dishwasher still isn’t draining after replacing the pump, there may be another issue. You should check for clogged hoses, a blocked filter, or a faulty drain valve. In some cases, the problem may lie in the control board or sensor that manages the drain cycle. It’s important to troubleshoot each possible cause methodically. If you're unable to identify the issue, calling a qualified technician can help avoid further damage to the appliance.

By following these steps, you can successfully replace your dishwasher pump without the need for expensive service calls. Just make sure you work carefully, double-check connections, and always test the appliance after installation. For long-lasting repairs, be sure to choose quality parts from trusted suppliers. AZParts offers a full range of replacement drain pumps and related components like door gaskets, hose fittings, and flood switches for popular brands including Bosch, Whirlpool, LG, and more. Whatever your model, AZParts has the right fit to keep your dishwasher running smoothly.

Contact information:

8 The Green, Ste A, Dover, Delaware 19901-3618, United States

support@azparts.com

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