How to Replace a Washing Machine Drain Pump: A Step-by-Step Guide

Updated at: 30/01/2025

A malfunctioning washing machine drain pump can quickly turn a simple laundry chore into a frustrating plumbing problem. A clogged or broken pump prevents your machine from effectively draining water, leading to overflowing tubs, smelly residue, and ultimately, costly repairs if left unchecked. Replacing the drain pump yourself can be a surprisingly manageable task, saving you the expense of a professional service call. This isn't rocket science, but it does require some basic DIY skills and the right tools. A faulty pump can manifest in a number of ways, so diagnosing the issue correctly is crucial before embarking on repairs.

This guide will walk you through the process of replacing your washing machine's drain pump step-by-step, providing clear instructions and helpful images to ensure a successful repair. From disconnecting the power and water supply to reassembling everything correctly, we'll cover every stage, leaving you with a smoothly functioning washing machine once more. Let's get started!

Preparation and Safety Guidelines

Tools Needed
  • 1/4 inch nut driver
  • 5/16 inch nut driver
  • flat blade screwdriver
  • pair of pliers
  • 2x4 blocks
  • adjustable wrench (optional)
  • container
Safety Guidelines
  • Always disconnect the washing machine from the power supply before starting any repair work. This prevents electric shock.
  • Turn off the water supply valves to both the hot and cold water lines connected to the washing machine. Failure to do so could result in flooding.
  • Be prepared for some water spillage. Place towels or a container underneath the washing machine to catch any remaining water in the hoses and pump.

Step-by-Step Instructions

  1. Prepare the Washer

    • Disconnect the power to the washer by unplugging it.
    • Pull the washer away from the wall and tilt it back using 2x4 blocks to elevate the front.
    Pull the washer away from the wall and tilt it back using 2x4 blocks to elevate the front.
    Prepare the Washer

  2. Access the Drain Pump

    • Remove the bottom access panel by unscrewing the 3/4 inch hex screws.
    Remove the bottom access panel by unscrewing the 3/4 inch hex screws.
    Access the Drain Pump

  3. Drain Remaining Water

    • Drain any remaining water from the pump and hoses by loosening the button trap counterclockwise.
    Drain any remaining water from the pump and hoses by loosening the button trap counterclockwise.
    Drain Remaining Water

  4. Disconnect the Old Pump

    • Remove the clamps securing the inlet and drain hoses to the pump using pliers.
    • Lift the retaining flap on the pump using a flathead screwdriver and pull the pump slightly to the right.
    • Disconnect the wire harness from the pump.
    Disconnect the wire harness from the pump.Disconnect the wire harness from the pump.Disconnect the wire harness from the pump.
    Disconnect the Old Pump

  5. Remove the Old Pump

    • Remove the old pump.
    Remove the old pump.
    Remove the Old Pump

  6. Prepare the New Pump

    • Remove the old clamp from the inlet hose and slide a new clamp onto the hose.
    Remove the old clamp from the inlet hose and slide a new clamp onto the hose.
    Prepare the New Pump

  7. Install the New Pump

    • Connect the new pump’s wire harness and position the pump into the base, ensuring the rubber flap locks it in place.
    • Reposition the inlet and outlet hoses, ensuring they are fully seated before tightening the clamps.
    Reposition the inlet and outlet hoses, ensuring they are fully seated before tightening the clamps.Reposition the inlet and outlet hoses, ensuring they are fully seated before tightening the clamps.
    Install the New Pump

  8. Reassemble the Washer

    • Reinstall the front access panel, securing it with the screws.
    • Reconnect the power to the washer.
    Reconnect the power to the washer.Reconnect the power to the washer.
    Reassemble the Washer

Read more: Fix Washing Machine Won't Spin: Quick & Easy Motor Coupler Replacement

Tips

  • Use an adjustable wrench to loosen the button trap if it's difficult to turn by hand.
  • Keep an old towel handy to soak up any remaining water in the hoses.
  • Make sure the hose is fully pulled onto the pump and the clamp is in the proper position before tightening.
  • Install the center screw of the front panel first to hold it in place while installing the outer screws.

Common Mistakes to Avoid

1. Incorrect Hose Connections

Reason: Connecting the drain hose improperly can lead to leaks or prevent the pump from functioning correctly.
Solution: Double-check all hose connections for tightness and correct routing, ensuring no kinks or obstructions.

2. Forgetting to Secure the Pump

Reason: A loose pump can vibrate excessively, potentially damaging the washing machine or causing leaks.
Solution: Securely fasten the new drain pump using the appropriate screws and ensure it's properly seated in its place.

3. Ignoring Debris in the Pump Housing

Reason: Leaving debris in the pump housing after removing the old pump can restrict the flow of water and damage the new pump.
Solution: Thoroughly clean the pump housing of any debris before installing the new pump.

FAQs

My washing machine is leaking, but the drain hose isn't clogged. Could it still be the drain pump?
Yes, a faulty drain pump can cause leaks even if the hose isn't clogged. Leaks often occur due to cracks or worn seals within the pump itself. Check for any visible signs of damage or water around the pump before replacing it.
How do I know if I need a specific type of drain pump for my washing machine?
The best way is to check your washing machine's model number and consult the manufacturer's parts list or a reputable appliance parts website. They'll list the correct pump part number for your specific model. Trying to use a generic pump can lead to compatibility issues.