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Quick answer
If your dishwasher leaves water in the bottom, check the drain pump, filter, and hose for clogs. Ensure the air gap is clear and the drain hose is properly connected. Run a test cycle after clearing any blockages.
Confirm the symptom
- Water remains in the bottom after a complete cycle
- Dishes are not fully dry
- Dishwasher makes gurgling or bubbling sounds during drain phase
- Water smells musty or stagnant
Tools and prep
- Screwdriver (flathead or Phillips, depending on model)
- Plumber’s putty or silicone sealant
- Bucket or towel to catch water
- Flashlight
- Rubber gloves
- Dishwasher cleaner or vinegar
- Turn off power at circuit breaker
- Turn off water supply to dishwasher
Step-by-step troubleshooting
- Check the Drain PumpDo: Locate the drain pump (usually at the bottom of the dishwasher) and inspect for debris or clogs.Observe: Debris or blockages in the pump.Means: Clogged drain pump preventing proper drainage.Next: Clean the pump and run a test cycle.
- Inspect the Drain HoseDo: Check the drain hose for kinks, clogs, or improper connections.Observe: Kinks or blockages in the hose.Means: Restricted water flow from the dishwasher.Next: Straighten or clear the hose and reconnect securely.
- Clean the FilterDo: Remove and clean the dishwasher filter under the bottom rack.Observe: Food particles or debris on the filter.Means: Clogged filter causing water to pool.Next: Rinse the filter thoroughly and reinstall.
- Check the Air GapDo: Inspect the air gap on the countertop for clogs.Observe: Debris or blockage in the air gap.Means: Blocked air gap preventing proper drainage.Next: Clean the air gap and run a test cycle.
- Test the Drain Pump MotorDo: Use a multimeter to test the drain pump motor for continuity.Observe: No continuity indicates a faulty motor.Means: Faulty drain pump motor needs replacement.Next: Replace the drain pump motor.
- Inspect the Drain ValveDo: Check the drain valve for debris or if it is stuck closed.Observe: Debris or a stuck valve.Means: Blocked drain valve preventing water from draining.Next: Clean the valve or replace if damaged.
- Check for Proper InstallationDo: Ensure the dishwasher is level and the drain hose is properly installed.Observe: Dishwasher is not level or hose is improperly installed.Means: Improper installation can cause drainage issues.Next: Adjust the dishwasher level and secure the hose connections.
Common causes
| Cause | Likelihood | Difficulty | Part often needed |
|---|---|---|---|
| Clogged drain pump Debris blocks water from draining properly. | Common | Easy | Drain pump cleaning kit |
| Clogged drain hose Food particles or grease block the hose. | Common | Easy | Drain hose cleaning kit |
| Clogged filter Food debris accumulates in the filter. | Common | Easy | Dishwasher filter |
| Blocked air gap Debris clogs the air gap, preventing drainage. | Sometimes | Easy | Air gap cleaning tool |
| Faulty drain pump motor Motor fails to pump water out. | Sometimes | Medium | Drain pump motor |
| Stuck or clogged drain valve Valve is blocked or stuck closed. | Sometimes | Medium | Drain valve |
| Improper installation Dishwasher not level or hose improperly connected. | Rare | Easy | Adjustment tools |
Parts matching
Replace or clean parts based on the issue you find:
- Drain pump cleaning kit for clogged pumps
- Drain hose cleaning kit for blocked hoses
- Dishwasher filter for clogged filters
- Air gap cleaning tool for blocked air gaps
- Drain pump motor for faulty motors
- Drain valve for stuck or clogged valves
- Adjustment tools for improper installation
Purchase OEM parts for compatibility and performance.
When to call a professional
- Water continues to pool after cleaning all components
- Drain pump motor shows no continuity and needs replacement
- You are unsure about electrical components or motor replacement
- Dishwasher is under warranty and you don't want to risk voiding it
- You notice water leaking outside the dishwasher
FAQ
How often should I clean my dishwasher filter?
Clean the filter every 1–2 months to prevent clogs and ensure proper drainage.
Can I use vinegar to clean my dishwasher?
Yes, run a cycle with a cup of white vinegar in a dishwasher-safe container to clean and deodorize.
Why is my dishwasher making gurgling sounds during the drain phase?
Gurgling sounds often indicate a clogged drain hose or air gap, restricting water flow.
What if the drain pump motor is faulty?
If the motor shows no continuity, it needs to be replaced by a professional or someone experienced with electrical repairs.
How do I know if the drain hose is properly connected?
The hose should be securely attached to the drain pipe without kinks and should not be submerged in the sink drain.