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Quick answer
If your dishwasher isn't draining, first check for clogs in the drain filter and drain hose. Ensure the drain hose is properly connected and not kinked. If these steps don't work, you may need to inspect the drain pump or impeller.
Confirm the symptom
- Water remains in the dishwasher after the cycle ends.
- Dishes are not getting clean due to standing water.
- Unpleasant odors coming from the dishwasher.
- Drainage noise is unusual or louder than usual.
- Error codes related to draining on the dishwasher's display.
Tools and prep
- Screwdriver (Phillips and flathead)
- Pliers
- Bucket
- Towel
- Flashlight
- Turn off the power to the dishwasher at the circuit breaker.
- Locate and turn off the water supply to the dishwasher.
- Clear the area around the dishwasher for easy access.
Step-by-step troubleshooting
- Check the Drain FilterDo: Locate the drain filter at the back of the dishwasher's bottom rack. Remove it by twisting counterclockwise.Observe: Look for food particles, debris, or other blockages.Means: If the filter is clogged, clean it thoroughly and replace it.Next: Run a short cycle to see if the issue is resolved.
- Inspect the Drain HoseDo: Check the drain hose for kinks, clogs, or damage. It's usually located under the sink or behind the dishwasher.Observe: Ensure the hose is properly connected and not obstructed.Means: If the hose is damaged, it needs to be replaced.Next: If the hose is clear and connected properly, move to the next step.
- Clean the Air GapDo: Locate the air gap on the countertop or sink. Remove the cap and clean out any debris.Observe: Check for blockages that could prevent water from draining.Means: If the air gap is clear, the issue is likely elsewhere.Next: Proceed to check the drain pump.
- Check the Drain PumpDo: Remove the lower access panel to access the drain pump.Observe: Look for any visible blockages or damage.Means: If the pump is clogged, clean it. If it's damaged, it may need replacement.Next: If the pump is fine, check the impeller.
- Inspect the ImpellerDo: Locate the impeller inside the drain pump. Ensure it can spin freely.Observe: Check for any obstructions or damage.Means: If the impeller is damaged, it needs to be replaced.Next: If the impeller is fine, check the drain valve.
- Check the Drain ValveDo: Locate the drain valve, usually near the drain pump.Observe: Ensure it opens and closes properly.Means: If the valve is faulty, it may need replacement.Next: If the valve is working, consider calling a professional.
Common causes
| Cause | Likelihood | Difficulty | Part often needed |
|---|---|---|---|
| Clogged Drain Filter Food particles and debris can accumulate and block the filter. | Common | Easy | None |
| Kinked or Clogged Drain Hose The hose can get bent or blocked, preventing proper drainage. | Common | Easy–Medium | New drain hose (if damaged) |
| Blocked Air Gap Debris can accumulate in the air gap, preventing water from draining. | Sometimes | Easy | None |
| Faulty Drain Pump The pump can fail or get clogged, preventing water from being pumped out. | Sometimes | Medium | New drain pump |
| Damaged Impeller The impeller can break or get stuck, preventing the pump from working. | Sometimes | Medium | New impeller |
| Faulty Drain Valve The valve can fail to open or close properly, blocking drainage. | Rare | Hard | New drain valve |
Parts matching
If you've identified a faulty part, here are some details to help you find the right replacement.
- Drain Filter: Usually located at the back of the bottom rack, designed to catch food particles.
- Drain Hose: Connects the dishwasher to the drain, typically made of plastic or metal.
- Air Gap: A small cap on the countertop or sink that allows air into the drain system.
- Drain Pump: A motorized component that pumps water out of the dishwasher.
- Impeller: A spinning part inside the drain pump that helps move water.
- Drain Valve: A mechanical part that opens and closes to control water flow.
Always ensure you get the correct part number for your specific dishwasher model.
When to call a professional
- If you're not comfortable performing the repairs yourself.
- If the dishwasher is still not draining after checking all components.
- If you suspect a more complex issue, such as a faulty control board.
- If there are leaks or significant damage to the dishwasher.
- If the dishwasher is under warranty, to avoid voiding it.
FAQ
Why is my dishwasher leaving standing water?
Standing water is often due to a clogged drain filter, kinked drain hose, or a faulty drain pump.
Can I use chemical drain cleaners in my dishwasher?
No, chemical drain cleaners can damage the dishwasher's components. Stick to manual cleaning methods.
How often should I clean the drain filter?
It's a good idea to clean the drain filter every month to prevent clogs and ensure proper drainage.