Quick answer
Turn off power and water. Check the drain hose for clogs, clean the filter, and inspect the pump. If water remains, the drain pump or float switch may need repair.
Confirm the symptom
- Water pools in the bottom of the dishwasher after a cycle
- Dishes are not fully dry
- Dishwasher emits a foul odor from standing water
- Drain hose is not visibly clogged but water still pools
- Error codes related to drainage appear on the display
Tools and prep
- Screwdriver (flathead or Phillips, depending on model)
- Plunger or wet/dry vacuum
- Bucket or towels
- Flashlight
- Replacement parts (if needed)
- Turn off power at circuit breaker
- Turn off water supply to dishwasher
Step-by-step troubleshooting
- Check for Standing WaterDo: Open the dishwasher and look for water pooled in the bottom.Observe: Water is present after a completed cycle.Means: Drainage issue is confirmed.Next: Clean the filter and drain hose.
- Clean the FilterDo: Locate and remove the filter (usually at the bottom of the tub). Rinse it under running water.Observe: Filter is clogged with debris.Means: Clogged filter is likely the cause.Next: Check the drain hose for clogs.
- Inspect the Drain HoseDo: Locate the drain hose (connects to the sink or garbage disposal). Check for kinks, clogs, or blockages.Observe: Hose is clogged or kinked.Means: Drain hose issue is preventing water from draining.Next: Unclog or replace the drain hose.
- Use a Plunger or VacuumDo: Place a plunger over the drain or use a wet/dry vacuum to clear stubborn clogs.Observe: Water drains after plunging or vacuuming.Means: Clog was successfully removed.Next: Run a test cycle.
- Inspect the Drain PumpDo: Locate the drain pump (usually near the bottom of the dishwasher). Check for debris or damage.Observe: Pump is clogged or damaged.Means: Drain pump failure may require replacement.Next: Replace the drain pump if damaged.
- Check the Float SwitchDo: Look for the float switch (if your model has one). Ensure it moves freely and is not stuck.Observe: Float switch is stuck or damaged.Means: Float switch malfunction may prevent drainage.Next: Replace the float switch.
- Run a Test CycleDo: Reconnect power and water. Run a short cycle to see if water drains properly.Observe: Water drains completely.Means: Issue is resolved.Next: Monitor for recurring issues.
- Check for Error CodesDo: Consult the user manual to interpret any error codes related to drainage.Observe: Error code indicates a specific issue (e.g., drain pump failure).Means: Error code provides guidance for further action.Next: Address the specific issue indicated by the error code.
Common causes
| Cause | Likelihood | Difficulty | Part often needed |
|---|---|---|---|
| Clogged Filter Food particles and debris can block the filter, preventing proper drainage. | Common | Easy | Dishwasher Filter |
| Clogged Drain Hose Grease, food particles, or mineral buildup can block the drain hose. | Common | Easy–Medium | Drain Hose |
| Faulty Drain Pump A malfunctioning drain pump cannot push water out of the dishwasher. | Sometimes | Medium | Drain Pump |
| Stuck Float Switch A stuck float switch can prevent the dishwasher from draining to avoid overflow. | Sometimes | Medium | Float Switch |
| Kinked or Blocked Hose A kink or blockage in the drain hose can stop water from flowing out. | Common | Easy | Drain Hose |
| Improper Installation Incorrect installation of the drain hose or pump can lead to drainage issues. | Rare | Hard | Installation Kit |
| Malfunctioning Timer or Control Board A faulty control board may not signal the drain pump to activate. | Rare | Hard | Control Board |
Parts matching
Common parts needed to fix a dishwasher not draining water in the bottom include:
- Dishwasher Filter
- Drain Hose
- Drain Pump
- Float Switch
- Control Board (rarely needed)
Purchase parts compatible with your dishwasher model using the model number from the user manual or appliance label.
When to call a professional
- Water still pools after cleaning the filter and drain hose
- Drain pump is damaged and you're unable to replace it yourself
- Float switch is stuck and cannot be fixed with basic tools
- Error codes persist after troubleshooting
- You're unsure about electrical components or control board issues
- Drainage issues recur frequently after DIY fixes
FAQ
Why is there water in the bottom of my dishwasher after a cycle?
Water pooling is usually due to a clogged filter, drain hose, or a faulty drain pump. Check these components first.
How do I know if the drain pump is bad?
If the pump is clogged, damaged, or makes unusual noises, it may need to be replaced. A multimeter can test for continuity.
Can a clogged garbage disposal cause drainage issues?
Yes, if the dishwasher drains into a disposal, a clog in the disposal can block water from exiting the dishwasher.
How often should I clean the dishwasher filter?
Clean the filter every 1–2 months to prevent clogs and maintain proper drainage.
What should I do if the float switch is stuck?
Try gently moving the float switch manually. If it doesn't move freely, it may need to be replaced.