Whirlpool Dishwasher Not Draining: Troubleshooting Guide
Quick answer
First, check if the drain hose is kinked or clogged. Ensure the drain filter is clean. If the problem persists, inspect the drain pump for blockages or failure. If you're unsure, consult a professional.
Confirm the symptom
- Dishwasher leaves standing water at the bottom.
- Dishes are not clean due to poor drainage.
- Dishwasher makes unusual noises during the drain cycle.
- Cycle completes but dishes are still wet.
- Error code related to drainage appears on the display.
Tools and prep
- screwdriver flathead — to remove panels and access internal components.
- screwdriver phillips — to remove panels and access internal components.
- needle nose pliers — to remove clogs from the drain hose.
- bucket — to catch water when draining the dishwasher.
- towel — to clean up spills and dry components.
- work gloves — to protect hands from sharp edges and debris.
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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 necessary tools and parts before starting the troubleshooting process.
Step-by-step troubleshooting
Check for Kinks in the Drain Hose
Do: Locate the drain hose at the back of the dishwasher.
Observe: Look for any kinks or twists in the hose.
Means: A kinked hose can restrict water flow and prevent proper drainage.
Next: If kinked, straighten the hose and run a test cycle.
Inspect the Drain Filter
Do: Remove the lower rack and locate the drain filter at the back of the dishwasher tub.
Observe: Check for food particles, debris, or blockages in the filter.
Means: A clogged filter can prevent water from draining properly.
Next: Clean the filter thoroughly and run a test cycle.
Clear the Air Gap
Do: Locate the air gap on the countertop or sink.
Observe: Remove the cap and check for blockages inside.
Means: The air gap can become clogged with food particles, preventing drainage.
Next: Clean the air gap and run a test cycle.
Check 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: A faulty drain pump can prevent water from being pumped out.
Next: If blocked, clear the obstruction. If faulty, consider replacement.
Inspect the Drain Valve
Do: Locate the drain valve, often near the drain pump.
Observe: Check for any blockages or signs of failure.
Means: A malfunctioning drain valve can prevent water from draining.
Next: If blocked, clear the obstruction. If faulty, consider replacement.
Examine the Check Valve
Do: Find the check valve, usually near the drain pump.
Observe: Ensure it is functioning properly and not stuck open or closed.
Means: A faulty check valve can cause drainage issues.
Next: If faulty, replace the check valve.
Test the Control Board
Do: Access the control board, typically located behind the control panel.
Observe: Look for any signs of damage or burnt components.
Means: A malfunctioning control board can cause various issues, including drainage problems.
Next: If damaged, consider professional repair or replacement.
Check for Power Issues
Do: Ensure the dishwasher is properly plugged in and receiving power.
Observe: Look for any loose or damaged wires.
Means: Power issues can affect the dishwasher's ability to drain.
Next: If power issues are found, address them and run a test cycle.
Common causes table
| Cause | Why | Likelihood | Difficulty | Part often needed |
|---|---|---|---|---|
| Kinked Drain Hose | The hose can become twisted or bent, restricting water flow. | High | Easy | None |
| Clogged Drain Filter | Food particles and debris can accumulate, blocking the filter. | High | Easy | None |
| Blocked Air Gap | Food particles can clog the air gap, preventing proper drainage. | Medium | Easy | None |
| Faulty Drain Pump | The pump may fail or become clogged, preventing water from being pumped out. | Medium | Medium | Drain pump |
| Malfunctioning Drain Valve | The valve can fail or become blocked, affecting drainage. | Medium | Medium | Drain valve |
| Faulty Check Valve | The check valve can malfunction, causing drainage issues. | Medium | Medium | Check valve |
| Damaged Control Board | A faulty control board can cause various operational problems, including drainage issues. | Low | Hard | Control board |
| Power Issues | Insufficient or interrupted power can affect the dishwasher's performance. | Low | Easy | None |
Parts matching
When replacing parts, ensure they match your specific Whirlpool dishwasher model. Check the model number, usually found on the inside of the dishwasher door or in the user manual.
- Drain pump: Match the model number and ensure it fits the dishwasher's specifications.
- Drain valve: Verify the part number and compatibility with your dishwasher model.
- Check valve: Ensure it matches the specifications of your dishwasher model.
- Control board: Match the model number and ensure it is compatible with your dishwasher.
If unsure about the correct part, consult the Whirlpool website or contact customer support.
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When to call a pro
- If the dishwasher is under warranty, contact Whirlpool customer support.
- If you are not comfortable performing the repairs yourself.
- If the issue persists after troubleshooting all potential causes.
- If you suspect a major component failure, such as the control board.
- If there are signs of water damage or electrical issues.
- If you encounter any safety concerns during the troubleshooting process.
FAQ
Why is my Whirlpool dishwasher not draining?
There could be several reasons, including a kinked drain hose, clogged drain filter, blocked air gap, faulty drain pump, malfunctioning drain valve, faulty check valve, damaged control board, or power issues.
How do I clean the drain filter in my Whirlpool dishwasher?
Remove the lower rack and locate the drain filter at the back of the dishwasher tub. Remove the filter and clean it thoroughly under running water to remove any food particles or debris.
What should I do if the drain hose is kinked?
Straighten the hose to ensure proper water flow. If the hose is damaged, consider replacing it with a new one that matches your dishwasher's specifications.
How can I tell if the drain pump is faulty?
Listen for unusual noises during the drain cycle. If the pump is making grinding or humming sounds, it may be faulty. Additionally, if water is not being pumped out, the pump may need replacement.
Can I replace the control board myself?
Replacing the control board can be complex and may require technical knowledge. If you are not comfortable with electrical components, it is best to contact a professional for assistance.
What should I do if the air gap is clogged?
Remove the cap from the air gap and use a small brush or pipe cleaner to clear any blockages. Ensure the air gap is clean and free of debris to allow proper drainage.