KitchenAid Dishwasher Not Draining? (Filter System + Diagnostic Mode)
Quick Fix: KitchenAid is owned by Whirlpool, and they share the same filter system. Clean both the upper cylindrical filter AND the lower flat filter — most people miss the lower filter, which catches the debris causing drainage problems.
Video Guide
Video: “KITCHENAID DISHWASHER WON’T DRAIN - EASY FIX” by Quick and Easy - 5 Minute Appliance Fixes
If you own a KitchenAid dishwasher with drainage issues, you’re in luck — troubleshooting is nearly identical to Whirlpool, with some KitchenAid-specific details covered below. For model-specific manuals and videos, visit KitchenAid’s official support page.
KitchenAid and Whirlpool: Same System
Whirlpool Corporation owns KitchenAid, and most components are shared between brands. This means:
- Same two-part filter system
- Same diagnostic mode
- Same drain pump design
- Similar error codes
If you’ve seen our Whirlpool guide, much of this will be familiar. This guide covers KitchenAid-specific features and model variations.
What You’ll Need
- Towels
- Soft brush
- Dish soap
- Flashlight
Step 1: Clean the Two-Part Filter System
KitchenAid uses Whirlpool’s two-part filter design.
Accessing the filters:
- Remove the lower dish rack
- Locate the cylindrical upper filter in the bottom center
- Turn the filter 1/4 turn counterclockwise (follow the arrow)
- Lift out the upper filter
- Lift out the lower flat filter underneath
Critical point: The lower filter is where most clogs hide. Don’t skip it.
Cleaning:
- Rinse both filters under hot running water
- Use a soft brush to scrub mesh surfaces
- For greasy buildup, soak in warm soapy water for 10 minutes
- Check the sump area (filter housing) for debris
- Remove any food particles from the sump
Reinstalling:
- Place the lower filter flat in position
- Insert the upper filter
- Turn clockwise until it clicks and locks
Step 2: Check the Drain Hose
Under your sink, verify the drain hose is properly installed:
Check for:
- Kinks or sharp bends
- Crushed sections from stored items
- Proper high loop installation
KitchenAid high loop requirement: The drain hose must loop up to the underside of the countertop before descending to the drain connection. This prevents backflow.
If connected to garbage disposal:
- Verify knockout plug was removed (new installations)
- Run the disposal before starting the dishwasher
- Check that the hose isn’t pushed too far in
Step 3: Run Diagnostic Mode
KitchenAid dishwashers have a service diagnostic mode for troubleshooting.
Entering diagnostic mode:
- Make sure the dishwasher is empty with door closed
- Press three buttons in sequence: 1-2-3, 1-2-3, 1-2-3
- Complete all three presses within 3 seconds
- Lights will flash or display will change when diagnostic mode is active
Which buttons? This varies by model, but commonly it’s:
- High Temp + Heated Dry + High Temp
- Or any three different buttons on the control panel
Running a drain test: Once in diagnostic mode, cycle through tests until you reach the drain test. The dishwasher will attempt to drain, and you can observe if the pump operates and water exits.
Error codes in diagnostic mode:
| Code/Signal | Meaning |
|---|---|
| F6E4 | Water supply issue |
| F8E4 | Drainage problem |
| F9E1 | Drain hose positioning |
| Flashing lights | Count flashes — check manual for meaning |
Step 4: Force a Drain Cycle
If you need to drain standing water immediately:
- Press the Cancel/Drain button
- Hold for 3 seconds
- The pump will run for approximately 2 minutes
- If water doesn’t drain, the pump may be blocked or failed
Alternatively, start any cycle and immediately cancel it — this triggers a drain attempt.
Step 5: Check the Drain Pump
If filters are clean and the hose is clear, the drain pump may be the problem.
Signs of pump issues:
- Humming sound but water doesn’t drain
- Grinding noise during drain cycle
- Complete silence when draining should occur
Pump location: Bottom of the dishwasher, accessible by removing the lower kickplate.
Pump inspection:
- Disconnect power
- Remove the kickplate (usually one or two screws)
- Locate the pump motor with hoses attached
- Check for debris in the pump housing
- Listen for the pump when running a drain cycle
For detailed testing, see our drain pump guide.
KitchenAid-Specific Features
ProWash and Express Wash
These cycles use different water volumes and drain timing. If drainage only fails on specific cycles:
- Try a Normal cycle to test baseline function
- Heavy buildup may only show problems on intensive cycles
- Express cycles drain faster — pump issues may be more apparent
PrintShield Finish Models
The exterior PrintShield coating doesn’t affect drainage, but these are typically premium models with more sensitive electronics. If you see error codes, note them carefully for service calls.
Integrated Handle vs. Bar Handle
This is cosmetic and doesn’t affect drainage. Filter and pump systems are the same across handle styles.
When to Call KitchenAid Service
Contact service if:
- Filters are clean but drainage problems persist
- Error codes keep appearing after reset
- Pump makes no sound during drain cycle
- Water leaks from beneath the dishwasher
KitchenAid support: 1-800-422-1230
Warranty: KitchenAid dishwashers typically come with a 1-year full warranty. Some components may have extended coverage.
Preventing Future Drainage Issues
- Clean filters monthly (or every 2 weeks for heavy use)
- Scrape dishes before loading — no pre-rinse needed
- Run garbage disposal before dishwasher cycles
- Use appropriate detergent amounts
- Run a cleaning cycle monthly (or use dishwasher cleaner)
FAQ
How do I unclog my KitchenAid dishwasher?
Start by cleaning both filters — the upper cylindrical filter AND the lower flat filter underneath. Most clogs are in the lower filter. Check the drain hose under the sink for kinks. If both are clear, the clog may be in the garbage disposal or drain pump.
How do I run a diagnostic on my KitchenAid dishwasher?
With the door closed and dishwasher empty, press any three buttons in a 1-2-3, 1-2-3, 1-2-3 sequence within 3 seconds. The dishwasher will enter diagnostic mode. Cycle through tests using the Start button to find the drain test.
Where is the filter on a KitchenAid dishwasher?
The filter is at the bottom center of the tub. Remove the lower rack to access it. Turn the upper filter counterclockwise to remove. Don’t forget the lower flat filter underneath — remove this separately and clean both parts.
Why is my KitchenAid dishwasher holding water?
A small amount of water is normal (keeps seals moist). More than 1/4 inch indicates a problem, usually a clogged filter. Clean both the upper and lower filters. If water remains after cleaning filters, check the drain hose for kinks and verify the garbage disposal is clear.
For more troubleshooting, see:
- Whirlpool Dishwasher Not Draining (same parent company)
- Complete Dishwasher Not Draining Guide