Whirlpool Dishwasher Not Draining Completely: Troubleshooting Guide
Quick answer
First, check for clogs in the drain filter and drain hose. If they're clear, inspect the drain pump for blockages or failure. If these steps don't resolve the issue, consider checking the control board or wiring.
Confirm the symptom
- Dishwasher leaves standing water at the bottom.
- Dishes are not clean due to poor drainage.
- Drain cycle does not complete.
- Error codes related to drainage appear on the display.
Tools and prep
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Prep & safety
- Ensure the dishwasher is turned off and unplugged from the power source.
- Allow the dishwasher to cool down if it was recently in use.
- Clear the area around the dishwasher for easy access.
- Gather your tools and have them within reach.
Step-by-step troubleshooting
Check the Drain Filter
Do: Locate the drain filter at the bottom of the dishwasher and remove it.
Observe: Look for any food particles, debris, or blockages.
Means: Clean the filter thoroughly with warm, soapy water.
Next: Reassemble and test the dishwasher.
Inspect the Drain Hose
Do: Disconnect the drain hose from the dishwasher and the sink drain.
Observe: Check for kinks, clogs, or damage in the hose.
Means: Straighten any kinks and clear any blockages.
Next: Reconnect the hose and test the dishwasher.
Examine the Drain Pump
Do: Access the drain pump, usually located at the bottom of the dishwasher.
Observe: Look for any blockages or signs of failure, such as unusual noises.
Means: Clear any blockages and test the pump for proper operation.
Next: If the pump is faulty, consider replacing it.
Check the Air Gap
Do: Locate the air gap on the kitchen counter or sink.
Observe: Ensure it is not clogged with debris.
Means: Clean the air gap if necessary.
Next: Test the dishwasher to see if the issue is resolved.
Inspect the Control Board
Do: Access the control board, usually located behind the control panel.
Observe: Look for any signs of damage or burnt components.
Means: Use a multimeter to test for continuity and proper voltage.
Next: If the control board is faulty, consider replacing it.
Check the Wiring
Do: Inspect the wiring connected to the drain pump and control board.
Observe: Look for any loose, damaged, or corroded wires.
Means: Repair or replace any damaged wiring as needed.
Next: Reassemble and test the dishwasher.
Common causes table
| Cause | Why | Likelihood | Difficulty | Part often needed |
|---|---|---|---|---|
| Clogged Drain Filter | Food particles and debris can accumulate and block the filter. | High | Easy | Drain Filter |
| Kinked or Clogged Drain Hose | The drain hose can become kinked or clogged, preventing proper drainage. | Medium | Easy | Drain Hose |
| Faulty Drain Pump | The drain pump may fail or become clogged, preventing water from being pumped out. | Medium | Moderate | Drain Pump |
| Clogged Air Gap | The air gap can become clogged with debris, preventing proper drainage. | Medium | Easy | Air Gap |
| Faulty Control Board | The control board may fail, preventing the dishwasher from completing the drain cycle. | Low | Hard | Control Board |
| Damaged Wiring | Loose, damaged, or corroded wires can disrupt the drainage process. | Low | Moderate | Wiring Harness |
Parts matching
When replacing parts, ensure they match your specific Whirlpool dishwasher model. You can find the model number on the dishwasher's interior or in the user manual.
- Drain Filter: Match the model and size of your dishwasher.
- Drain Hose: Ensure the length and diameter match your dishwasher and sink setup.
- Drain Pump: Match the model and voltage requirements of your dishwasher.
- Air Gap: Ensure compatibility with your dishwasher and sink setup.
- Control Board: Match the model and voltage requirements of your dishwasher.
- Wiring Harness: Ensure compatibility with your dishwasher model.
Always double-check the part number and specifications before purchasing replacements.
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When to call a pro
- If the dishwasher is under warranty, contact the manufacturer for service.
- If you are not comfortable performing the repairs yourself.
- If the issue persists after attempting the troubleshooting steps.
- If you suspect a gas leak or other safety hazard.
FAQ
Why is my Whirlpool dishwasher not draining completely?
Common causes include a clogged drain filter, kinked or clogged drain hose, faulty drain pump, clogged air gap, faulty control board, or damaged wiring.
How do I clean the drain filter in my Whirlpool dishwasher?
Locate the drain filter at the bottom of the dishwasher, remove it, and clean it thoroughly with warm, soapy water.
What should I do if the drain hose is kinked?
Straighten the kinked section of the hose and ensure it is properly connected to both the dishwasher and the sink drain.
How do I test the drain pump in my Whirlpool dishwasher?
Access the drain pump and use a multimeter to test for continuity and proper voltage. Listen for unusual noises during operation.