Diy Dishwasher Repair: How To Test A Whirlpool Drain Pump And Fix Drainage Problems

A malfunctioning drain pump can cause your Whirlpool dishwasher to fail to drain water properly, leading to a wet and unpleasant kitchen. If you suspect your dishwasher’s drain pump is not working, it’s essential to test it to confirm the issue and initiate repairs. This comprehensive guide will walk you through the step-by-step process of testing a Whirlpool dishwasher drain pump, providing you with the knowledge and confidence to troubleshoot and fix the problem effectively.

Step 1: Safety Precautions

Before you begin testing the drain pump, ensure you take the following safety precautions:

• Unplug the dishwasher from the electrical outlet to prevent electrical shock.
• Turn off the water supply to the dishwasher to avoid flooding.
• Wear gloves to protect your hands from sharp edges or electrical components.

Step 2: Accessing the Drain Pump

Locate the drain pump housing at the bottom of the dishwasher, usually near the back. Remove the lower access panel or kickplate to expose the drain pump.

Step 3: Inspecting the Drain Pump

Visually inspect the drain pump for any visible damage, such as cracks, leaks, or loose wires. Look for any blockages or debris that may be obstructing the pump’s operation.

Step 4: Testing the Drain Pump with a Multimeter

Use a multimeter to test the drain pump‘s continuity. Set the multimeter to the ohms setting. Connect one probe to each terminal on the drain pump. If the multimeter displays a reading of less than 1 ohm, the pump is likely functioning properly. A reading of infinity indicates an open circuit, requiring pump replacement.

Step 5: Testing the Drain Pump with a Voltage Tester

If the multimeter test indicates a problem, further test the drain pump using a voltage tester. Connect the tester to the drain pump’s terminals. Start a drain cycle on the dishwasher. If the voltage tester shows no voltage while the dishwasher is attempting to drain, it confirms a power supply issue.

Step 6: Troubleshooting Power Supply Issues

If the voltage tester indicates no power, check the following:

• Ensure the dishwasher is plugged into a working electrical outlet.
• Inspect the electrical wiring for any damage or loose connections.
• Test the dishwasher’s control board to rule out any electrical problems.

Step 7: Replacing the Drain Pump

If the drain pump is faulty and cannot be repaired, it needs to be replaced. Follow these steps to replace the drain pump:

• Disconnect the drain hose and electrical wires from the old pump.
• Remove the mounting screws holding the pump in place.
• Install the new drain pump, ensuring it is securely mounted and the connections are tight.

Final Note: Troubleshooting Success

By following these steps, you can effectively test a Whirlpool dishwasher drain pump, troubleshoot any issues, and repair or replace the pump if necessary. With a functioning drain pump, your dishwasher will restore its ability to drain water effectively, ensuring a clean and efficient kitchen experience.

Popular Questions

Q1: What are the symptoms of a faulty Whirlpool dishwasher drain pump?
A1: Common symptoms include water remaining in the dishwasher after a cycle, slow draining, or a humming or grinding noise during draining.

Q2: Can I clean the drain pump to fix it?
A2: Yes, you can try cleaning the drain pump if there are visible blockages or debris. However, if the pump is damaged or has electrical issues, cleaning may not resolve the problem.

Q3: How often should I test the dishwasher drain pump?
A3: It’s recommended to test the drain pump periodically, especially if you notice any draining issues or have had the dishwasher for several years. Regular testing can help identify potential problems and prevent major repairs.