Quick answer
First, ensure the dishwasher is level and the drain hose is not kinked. Then, check the drain filter and drain hose for clogs. If these are clear, inspect the drain pump and impeller for blockages or damage. Always disconnect power before starting any repairs.
Confirm the symptom
- Water remains in the dishwasher after the cycle ends.
- Dishes are not getting clean due to standing water.
- Dishwasher makes unusual noises during the drain cycle.
- Error codes related to draining appear on the control panel.
- Water leaks from the dishwasher during or after the cycle.
Tools and prep
- Screwdriver (Phillips and flathead)
- Pliers
- Bucket
- Towel
- Flashlight
- Dishwasher manual
- Turn off power to the dishwasher at the circuit breaker.
- Locate and turn off the water supply valve 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 interior. Remove it by twisting and pulling it out.Observe: Look for food particles, debris, or other blockages.Means: If the filter is clogged, clean it thoroughly and replace it.Next: Check the drain hose.
- Check the Drain HoseDo: Locate the drain hose under the sink or behind the dishwasher. Disconnect it from the drain line.Observe: Look for kinks, clogs, or damage in the hose.Means: If the hose is kinked or clogged, straighten it or clear the blockage. If damaged, replace the hose.Next: Inspect the drain pump.
- Inspect the Drain PumpDo: Access the drain pump, usually located at the bottom of the dishwasher. Remove the lower access panel.Observe: Check for blockages or damage to the pump and impeller.Means: Clear any blockages or replace the pump if damaged.Next: Test the dishwasher.
- Check the Air GapDo: Locate the air gap on the countertop or sink. Remove the cap and check for blockages.Observe: Look for food particles or debris.Means: Clear any blockages and replace the cap.Next: Test the dishwasher.
- Inspect the Drain ValveDo: Locate the drain valve, usually near the drain pump. Remove any obstructions.Observe: Check for blockages or damage.Means: Clear any blockages or replace the valve if damaged.Next: Test the dishwasher.
- Test the DishwasherDo: Reassemble all components and restore power and water supply.Observe: Run a test cycle to ensure the dishwasher drains properly.Means: If the issue persists, consult a professional.Next: N/A
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 become kinked or clogged, preventing proper drainage. | Common | Easy–Medium | New drain hose (if damaged) |
| Faulty Drain Pump The pump can become blocked or fail, preventing water from being pumped out. | Sometimes | Medium | Drain pump |
| Blocked Air Gap The air gap can become clogged, preventing water from draining properly. | Sometimes | Easy | None |
| Faulty Drain Valve The valve can become blocked or fail, preventing water from draining. | Rare | Medium | Drain valve |
| Improper Installation The dishwasher may not be level or properly connected to the drain line. | Rare | Easy–Medium | None |
Parts matching
If you need to replace any parts, ensure they are compatible with your dishwasher model. Check your dishwasher's manual or consult the manufacturer's website for specific part numbers.
- Drain filter
- Drain hose
- Drain pump
- Air gap
- Drain valve
- Leveling legs (if improper installation is the cause)
Always double-check the part number and compatibility before purchasing replacement parts.
When to call a professional
- If the dishwasher is still not draining after troubleshooting.
- If you encounter complex electrical issues.
- If you're not comfortable performing the repairs yourself.
- If the dishwasher is under warranty.
- If you suspect a plumbing issue beyond the dishwasher.
FAQ
Why is there standing water in my dishwasher?
Standing water in the dishwasher is usually due to a clogged drain filter, kinked drain hose, or faulty drain pump. Check these components first.
Can I use chemical drain cleaners in my dishwasher?
No, chemical drain cleaners can damage the dishwasher's components. Stick to manual cleaning and removing clogs.
How often should I clean the drain filter?
Clean the drain filter every 3-6 months to prevent clogs and ensure proper drainage.
What if the dishwasher makes loud noises during the drain cycle?
Loud noises during the drain cycle can indicate a clogged or faulty drain pump. Inspect the pump and impeller for blockages or damage.