Quick answer
Turn off power and water. Check the drain hose for clogs, clean the filter, and ensure the air gap is clear. If the pump is faulty, it may need replacement.
Confirm the symptom
- Standing water in the bottom of the dishwasher after cycles
- Dishes are not fully dry
- Dishwasher leaks during or after cycles
- Error code related to drainage
Tools and prep
- Screwdriver
- Plunger
- Bucket
- Flashlight
- Needle-nose pliers
- Rubber gloves
- Turn off power at circuit breaker
- Shut off water supply
Step-by-step troubleshooting
- Check Drain HoseDo: Locate and inspect the drain hose for kinks or clogs.Observe: Look for blockages or debris.Means: A clogged hose prevents proper drainage.Next: Clear the clog or replace the hose if damaged.
- Clean the FilterDo: Remove and clean the dishwasher filter under the bottom rack.Observe: Check for food particles or debris.Means: A dirty filter can restrict water flow.Next: Rinse the filter thoroughly and reinstall it.
- Inspect the Air GapDo: Check the air gap on the countertop for blockages.Observe: Look for debris or standing water.Means: A clogged air gap prevents water from draining.Next: Clean the air gap with a brush or pipe cleaner.
- Test the PumpDo: Listen for the pump running during the drain cycle.Observe: No sound or unusual noises may indicate a problem.Means: A faulty pump cannot remove water.Next: Check for clogs in the pump or replace it if necessary.
- Check the Drain ValveDo: Inspect the drain valve for debris or damage.Observe: Look for obstructions or a stuck valve.Means: A blocked or faulty valve stops water from exiting.Next: Clean the valve or replace it if damaged.
- Verify Drain Line InstallationDo: Ensure the drain hose is properly connected and not kinked.Observe: Check for correct slope and secure connections.Means: Improper installation can cause drainage issues.Next: Adjust or reposition the hose as needed.
Common causes
| Cause | Likelihood | Difficulty | Part often needed |
|---|---|---|---|
| Clogged Drain Hose Food particles or debris block water flow. | Common | Easy | Drain hose |
| Dirty Filter Accumulated debris restricts water flow. | Common | Easy | Dishwasher filter |
| Clogged Air Gap Debris blocks the air gap, preventing drainage. | Sometimes | Easy | Air gap |
| Faulty Drain Pump The pump fails to remove water from the dishwasher. | Sometimes | Medium | Drain pump |
| Blocked Drain Valve Debris or damage prevents the valve from opening. | Sometimes | Medium | Drain valve |
| Improper Drain Hose Installation Incorrect slope or kinks prevent proper drainage. | Rare | Easy | Drain hose |
Parts matching
Common parts needed for a dishwasher not emptying water include:
- Drain hose
- Dishwasher filter
- Air gap assembly
- Drain pump
- Drain valve
Purchase parts compatible with your dishwasher model for best results.
When to call a professional
- Standing water persists after multiple attempts to clear clogs
- Unusual noises or vibrations during the drain cycle
- Error codes persist after troubleshooting
- You suspect electrical issues with the pump or control board
- Water leaks from unexpected areas
- You are unsure about handling electrical components
FAQ
How often should I clean my dishwasher filter?
Clean the filter every 1–2 months to prevent clogs and maintain performance.
Can a clogged air gap cause a dishwasher to not drain?
Yes, a clogged air gap can prevent water from draining properly, leading to standing water in the dishwasher.
How do I know if the drain pump is faulty?
If you hear no sound from the pump during the drain cycle or notice unusual noises, the pump may be faulty and need replacement.
What should I do if the drain hose is kinked?
Straighten the hose or replace it if it's damaged to ensure proper water flow.
Why is my dishwasher leaking after I tried to fix the drainage issue?
Leaks may occur if the drain hose connections are loose or if the hose is damaged. Check all connections and replace the hose if necessary.