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Quick answer
First, ensure the dishwasher is level and the drain hose is not kinked. Check the drain filter for clogs and clean it if necessary. If the problem persists, inspect the drain pump and impeller for blockages or damage.
Confirm the symptom
- Water remains in the dishwasher after the cycle ends.
- Dishes are not clean due to standing water.
- Dishwasher makes unusual noises during the drain cycle.
- Error codes related to draining appear on the display.
Tools and prep
- Screwdriver (Phillips and flathead)
- Pliers
- Bucket or towels (to catch water)
- Flashlight
- Gloves
- Turn off power to the dishwasher at the circuit breaker.
- Shut off the water supply to the dishwasher.
- Remove the bottom dish rack to access the filter and drain area.
Step-by-step troubleshooting
- Check the Drain FilterDo: Locate the drain filter at the back of the dishwasher's bottom. Remove it by twisting and pulling it out.Observe: Inspect the filter for food particles, debris, or blockages.Means: If the filter is clogged, clean it thoroughly with warm soapy water and replace it.Next: Run a test cycle to see if the issue is resolved.
- Inspect the Drain HoseDo: Locate the drain hose under the dishwasher and check for kinks or blockages.Observe: Ensure the hose is properly connected and not damaged.Means: Straighten any kinks and replace the hose if it is damaged.Next: Run a test cycle to see if the issue is resolved.
- Check the Air GapDo: Locate the air gap on the countertop or sink and remove the cap.Observe: Check for blockages in the air gap.Means: Clean out any debris and replace the cap.Next: Run a test cycle to see if the issue is resolved.
- Inspect the Drain PumpDo: Locate the drain pump at the bottom of the dishwasher. Remove the pump cover.Observe: Check for blockages or damage to the impeller.Means: Remove any debris and ensure the impeller spins freely.Next: If the impeller is damaged, replace the drain pump.
- Check the Drain ValveDo: Locate the drain valve, usually near the drain pump.Observe: Ensure the valve is not stuck or blocked.Means: Clean the valve and ensure it opens and closes properly.Next: If the valve is damaged, replace it.
- Inspect the Drain SolenoidDo: Locate the drain solenoid, usually near the drain valve.Observe: Check for continuity using a multimeter.Means: If the solenoid is faulty, replace it.Next: Run a test cycle to see if the issue is resolved.
- Check the Control BoardDo: Locate the control board, usually behind the control panel.Observe: Inspect for any visible damage or burnt components.Means: If the control board is faulty, replace it.Next: Run a test cycle to see if the issue is resolved.
Common causes
| Cause | Likelihood | Difficulty | Part often needed |
|---|---|---|---|
| Clogged Drain Filter Food particles and debris can accumulate in the filter, preventing proper drainage. | Common | Easy | None |
| Kinked or Blocked Drain Hose The drain hose can become kinked or blocked, preventing water from draining. | Common | Easy | None |
| Blocked Air Gap The air gap can become clogged with debris, preventing proper drainage. | Sometimes | Easy | None |
| Faulty Drain Pump The drain pump can become clogged or fail, preventing water from being pumped out. | Sometimes | Medium | Drain Pump |
| Stuck Drain Valve The drain valve can become stuck or blocked, preventing proper drainage. | Sometimes | Medium | Drain Valve |
| Faulty Drain Solenoid The drain solenoid can fail, preventing the drain valve from opening. | Rare | Medium | Drain Solenoid |
| Faulty Control Board The control board can fail, preventing the dishwasher from operating properly. | Rare | Hard | Control Board |
Parts matching
If you need to replace any parts, ensure you get the correct model-specific components for your dishwasher.
- Drain Filter
- Drain Hose
- Drain Pump
- Drain Valve
- Drain Solenoid
- Control Board
Always double-check the part number and compatibility with your dishwasher model before purchasing.
When to call a professional
- If the dishwasher is under warranty.
- If you are not comfortable performing the repairs yourself.
- If the issue persists after trying all the troubleshooting steps.
- If you suspect a major component failure, such as the control board.
- If there are signs of water damage or leaks.
- If you encounter any electrical issues.
FAQ
Why is my dishwasher not draining completely?
The most common reasons are 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 3-6 months to prevent clogs and ensure proper drainage.