Dishwasher Not Draining Water: Fix It Yourself
Quick answer
To fix a dishwasher that won't drain water, first check the drain hose for clogs and clear any blockages. Inspect the pump for debris and ensure the drain valve is open. If the problem persists, the pump or float switch may need replacement.
Confirm the symptom
- Water remains in the dishwasher after a cycle ends
- Dishes are not dry and water pools at the bottom
- Dishwasher makes gurgling or bubbling sounds during drain phase
- Error code related to drainage appears on the display
- Dishwasher overflows during the drain cycle
Tools and prep
- Plunger — To clear minor clogs in the drain
- Screwdriver — To access the dishwasher components
- Flashlight — To inspect hard-to-see areas
- Bucket — To collect water during cleaning
- Wire brush — To remove debris from the pump
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Prep & safety
- Unplug the dishwasher to prevent electrical hazards.
- Place a towel or bucket under the dishwasher to catch any water spills.
Step-by-step troubleshooting
Check for Drain Hose Clogs
Do: Locate the drain hose and inspect it for kinks or blockages.
Observe: If the hose is clogged, water will not drain properly.
Means: A clogged drain hose is preventing water from exiting the dishwasher.
Next: Use a plunger or a drain snake to clear the clog.
Inspect the Pump
Do: Remove the lower panel of the dishwasher and locate the pump.
Observe: Look for debris or damage in the pump.
Means: A clogged or faulty pump can prevent water from draining.
Next: Clean the pump with a wire brush or replace it if damaged.
Check the Drain Valve
Do: Locate the drain valve and ensure it is open and not clogged.
Observe: If the valve is closed or blocked, water will not drain.
Means: A closed or clogged drain valve is preventing water from exiting.
Next: Clean the valve or replace it if necessary.
Test the Float Switch
Do: Check the float switch to ensure it is not stuck in the up position.
Observe: If the float switch is stuck, the dishwasher will not drain.
Means: A stuck float switch is preventing the drain cycle from starting.
Next: Clean the float switch or replace it if damaged.
Check for Error Codes
Do: Look at the dishwasher's display for any error codes related to drainage.
Observe: Error codes can indicate specific issues with the drain system.
Means: Error codes provide a direct indication of the problem.
Next: Refer to the user manual to interpret the error code and take appropriate action.
Inspect the Air Gap
Do: Check the air gap on the countertop for blockages.
Observe: A clogged air gap can prevent proper drainage.
Means: An air gap blockage is causing water to back up into the dishwasher.
Next: Clean the air gap with a brush or replace it if damaged.
Common causes table
| Cause | Why | Likelihood | Difficulty | Part often needed |
|---|---|---|---|---|
| Clogged drain hose | Food particles or debris can block the hose. | High | Low | Drain hose |
| Clogged or faulty pump | Debris can damage or clog the pump. | High | Medium | Pump |
| Clogged drain valve | Debris can block the valve from opening. | Medium | Low | Drain valve |
| Stuck float switch | Food particles can cause the float to stick. | Medium | Low | Float switch |
| Clogged air gap | Food particles can block the air gap. | Medium | Low | Air gap |
| Faulty drain motor | The motor may be damaged or worn out. | Low | High | Drain motor |
Parts matching
When replacing parts, ensure they match your dishwasher's model and specifications.
- Drain hose: match the length and diameter to your dishwasher model
- Pump: check the voltage and amperage rating
- Drain valve: ensure it is compatible with your dishwasher's make and model
- Float switch: verify the type and size required for your unit
- Air gap: confirm it fits the countertop and connects to the drain hose
Consult your dishwasher's manual for specific part numbers and compatibility information.
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When to call a pro
- If the dishwasher still does not drain after clearing clogs and checking components
- If you are unable to locate or access the pump or drain valve
- If the float switch or drain motor is damaged and requires professional replacement
- If error codes persist after troubleshooting
- If you are unsure about the correct part to replace or how to install it
FAQ
Why is my dishwasher not draining even after I cleared the drain hose?
There may be a blockage in the pump or drain valve. Check these components for debris or damage.
Can a clogged air gap cause my dishwasher to not drain?
Yes, a clogged air gap can prevent proper drainage. Clean the air gap with a brush or replace it if damaged.
What should I do if the float switch is stuck?
Clean the float switch to remove any debris. If it is damaged, replace it with a compatible part.
How do I know if the drain motor is faulty?
If the pump does not activate during the drain cycle and there are no blockages, the motor may be faulty and need replacement.
Is it normal for water to pool at the bottom of the dishwasher after a cycle?
No, water should drain completely. Pooling water indicates a drainage issue that needs to be addressed.