The drain pump in your Whirlpool front-loading washer plays a key role in removing water during wash and spin cycles. If your washer isn’t draining properly, the pump could be clogged or malfunctioning, leaving water in the drum. We’ll help you test the drain pump to determine if it’s the problem and provide step-by-step instructions for replacing it if necessary.
Signs of a Failing Drain Pump
Before you begin testing or replacing the drain pump, it’s important to recognize the symptoms of a malfunctioning pump. Here are common indicators:
- Water Not Draining: If water remains in the drum after a wash or spin cycle, the pump might be clogged or broken.
- Unusual Noises: A grinding or buzzing sound during the drain cycle can indicate a blockage or mechanical failure in the pump.
- Error Codes: Modern Whirlpool washers may display error codes related to drainage issues. Consult your user manual to interpret these codes.
- Slow Draining: If the washer drains water much slower than usual, debris might be obstructing the pump or hoses.
- Leaks: Water leaking from the bottom of the washer could result from a damaged pump or disconnected hoses.
Tools and Materials
- 1/4-inch nut driver
- Flathead screwdriver
- Channel-lock pliers
- T25 Torx driver
- Multimeter
Safety Precautions
Safety is crucial when working on any appliance. Follow these guidelines to ensure a safe repair process:
- Always unplug the washer or switch off the circuit breaker to eliminate the risk of electric shock.
- Use insulated work gloves to protect your hands from sharp edges and debris. Safety glasses are recommended when handling chemicals or working with dusty components.
- If the appliance was recently in use, wait for any heated parts to cool before starting work.
- Ensure your hands and work area are completely dry to prevent electrical hazards.
- Keep your work area clear of clutter, and ensure children and pets are kept away during the repair.
- Take pictures or label wiring connections before disassembly to make reassembly easier.
- Avoid using excessive force when removing or reinstalling components to prevent damage.
- Refer to your washer’s user manual for any model-specific instructions or warnings.
How to Test and Replace the Drain Pump on a Washer
Testing the Main Control Board
- Unplug the washer to ensure safety.
- Remove the screws holding the top panel at the back of the washer using a 1/4-inch nut driver.
- Slide the top panel back, lift it off, and set it aside.
- Locate the main control board and squeeze the tabs to rotate its top cover upward.
- Plug the washer back in.
- Set your multimeter to Volts AC (look for a “V” with a squiggly line).
- Test the two black wires at connection DP2 while the washer is set to drain and spin.
- Confirm 120 Volts AC within a minute after the door locks.
- If voltage is present, cancel the cycle and proceed.
Testing the Drain Pump
- Unplug the washer again.
- Disconnect the wires from connection DP2.
- Set your multimeter to measure resistance (Ohms, symbolized by an upside-down horseshoe).
- Test the black wires at the DP2 connection for resistance. Look for a reading around 16 Ohms.
- Replace the pump if the reading is significantly off.
Draining the Tub
- Use a drain hose and container to drain any water from the tub.
Accessing the Drain Pump
- Remove the detergent drawer.
- Use a T25 Torx driver to remove screws behind the detergent drawer.
- Remove screws at the top corners of the user interface panel using a 1/4-inch nut driver.
- Lift the locking tabs on the panel with a flathead screwdriver, disconnect the wires, and set the panel aside.
- Open the washer door and remove the door boot spring with a flathead screwdriver.
- Remove the T25 screws holding the door lock.
- Remove screws at the bottom of the front panel using a 1/4-inch nut driver.
- Lift off the front panel.
Inspecting and Cleaning the Drain Pump
- Drain any remaining water using the drain hose.
- Remove the coin catch filter and check for debris.
Replacing the Drain Pump
- Use channel lock pliers to remove the retaining ring holding the tub-to-pump hose.
- Disconnect the red grommet from the front of the drain pump housing.
- Pull the pump housing forward and lift it to remove the pump.
- Insert the new red grommet into the washer.
- Secure the pump housing to the rear grommets in the base.
- Attach the front of the pump housing with the red grommet.
Reassembling the Washer
- Use channel lock pliers to secure the tub-to-pump hose and drain hose with retaining rings.
- Position the front panel on the mounting hooks at the top of the washer frame.
- Secure the front panel with 1/4-inch screws at the bottom.
- Reattach the door lock using T25 screws.
- Press the door gasket onto the front panel lip and reinstall the door seal ring.
- Reconnect the interface wire to the user interface control panel.
- Lock the panel in place and secure it with screws.
- Slide the top panel back into position behind the user panel.
- Reattach the top panel with 1/4-inch screws at the back.
- Reinsert the detergent drawer.
- Plug the washer back in or turn the breaker back on.
Preventing Drain Pump Issues
Proper care and regular maintenance can help extend the life of your washer’s drain pump. Here are some tips to prevent problems:
- Check Pockets Before Washing: Small objects like coins, hairpins, or buttons can clog the pump or hoses.
- Clean the Lint Filter: Some washers have a filter near the drain pump to catch debris. Clean it periodically to prevent blockages.
- Inspect Hoses Regularly: Ensure the hoses connected to the pump are free of kinks and debris.
- Avoid Overloading: Overloading the washer can strain the pump and other components, potentially leading to premature wear.
- Use Appropriate Detergents: High-efficiency (HE) washers require HE detergents to minimize residue buildup in the system.
With these steps, you can troubleshoot and replace your Whirlpool washer’s drain pump without stress. Taking the time to maintain your washer and keep an eye out for warning signs will save you from bigger headaches down the road. Plus, knowing how to handle minor repairs gives you a sense of accomplishment (and saves you money!).
Remember, if you’re ever unsure or uncomfortable with a repair, it’s okay to call in a professional. But now, you’re equipped with the knowledge to tackle this common issue confidently.