Quick answer
First, check if the drain hose is clogged or kinked. If not, inspect the drain filter and pump for blockages. If these are clear, you may need to replace the drain pump or check the motor. Always ensure the dishwasher is unplugged before starting any repairs.
Confirm the symptom
- Water remains in the dishwasher after the cycle ends.
- Dishwasher makes unusual noises during the drain cycle.
- Dishes are not clean due to standing water.
- Error code related to draining appears on the control panel.
- Dishwasher stops mid-cycle and displays an error.
Tools and prep
- Screwdriver (Phillips and flathead)
- Pliers
- Bucket
- Towel
- Flashlight
- Replacement parts if needed
- Unplug the dishwasher or turn off the circuit breaker
- Locate and turn off the water supply valve to the dishwasher
Step-by-step troubleshooting
- Check the Drain HoseDo: Pull the dishwasher away from the cabinet and locate the drain hose.Observe: Ensure the hose is not kinked or clogged.Means: If kinked, straighten it. If clogged, clear the obstruction.Next: Check the drain filter.
- Inspect the Drain FilterDo: Remove the lower rack and locate the filter at the back of the dishwasher.Observe: Check for food particles or debris.Means: Clean the filter thoroughly.Next: Check the drain pump.
- Check the Drain PumpDo: Access the drain pump, usually located at the bottom of the dishwasher.Observe: Look for blockages or damage.Means: Clear any obstructions or replace the pump if damaged.Next: Test the dishwasher.
- Inspect the Drain ImpellerDo: Locate the impeller inside the drain pump.Observe: Check for damage or blockages.Means: Clear any obstructions or replace the impeller if damaged.Next: Check the motor.
- Check the MotorDo: Locate the motor, usually connected to the drain pump.Observe: Listen for any unusual noises when the dishwasher is running.Means: If the motor is faulty, it may need to be replaced.Next: Test the dishwasher.
- Test the DishwasherDo: Plug the dishwasher back in and run a test cycle.Observe: Monitor the dishwasher to ensure it drains properly.Means: If the issue persists, consult a professional.Next: N/A
Common causes
| Cause | Likelihood | Difficulty | Part often needed |
|---|---|---|---|
| Clogged Drain Hose Food particles or debris can block the hose, preventing water from draining. | Common | Easy | None |
| Blocked Drain Filter The filter can become clogged with food particles, preventing proper drainage. | Common | Easy | None |
| Faulty Drain Pump The pump may be damaged or worn out, failing to drain water effectively. | Sometimes | Medium | Drain Pump |
| Damaged Drain Impeller The impeller can become damaged or clogged, preventing water from being pushed out. | Sometimes | Medium | Drain Impeller |
| Faulty Motor The motor may not be functioning properly, failing to power the drain pump. | Rare | Hard | Motor |
| Kinked Drain Hose The hose can become bent or kinked, restricting water flow. | Common | Easy | None |
Parts matching
Ensure you have the correct parts before starting any repairs. Match the part numbers with your dishwasher's model for compatibility.
- Drain Pump
- Drain Impeller
- Drain Hose
- Motor
- Drain Filter
Always check the part numbers against your dishwasher's model to ensure compatibility.
When to call a professional
- If the dishwasher still won't drain after troubleshooting.
- If you hear unusual noises from the motor or pump.
- If you suspect a major component like the motor is faulty.
- If you are not comfortable performing the repairs yourself.
- If the dishwasher leaks water during the drain cycle.
- If the dishwasher displays an error code you don't understand.
FAQ
Why is my dishwasher not draining?
Common causes include a clogged drain hose, blocked drain filter, faulty drain pump, or damaged drain impeller.
How do I clean the drain filter?
Remove the lower rack, locate the filter at the back of the dishwasher, and clean it thoroughly to remove any food particles or debris.
Can I fix a faulty drain pump myself?
If you are comfortable with basic repairs, you can replace the drain pump. However, if you are unsure, it's best to call a professional.
What should I do if the dishwasher still won't drain?
If you've tried all the steps and the dishwasher still won't drain, it's time to call a professional for further diagnosis and repair.