KitchenAid Dishwasher Not Draining? Try These Fixes [2026]

Quick Fix Summary

Most KitchenAid dishwasher drain problems are solved by clearing a clog in the filter and sump, then checking the drain hose or air gap for blockages. Also verify the garbage disposal knockout plug was removed and run a force-drain or reset; these steps resolve the issue for the majority of homeowners.

What Causes This Problem

KitchenAid dishwashers rely on a small drain pump to push wastewater through a hose to your sink drain or air gap. Food debris, labels, glass, or grease can clog the filter, sump, air gap, or hose and prevent flow. Installation issues (kinked hose, missing high loop, or a disposal knockout plug left in place) are common. Less often, the drain pump fails electrically or mechanically. The control can also store a long-drain error (often F9E1 or 9-1) that persists until the blockage is cleared and the unit is reset.

Step-by-Step Troubleshooting

1. Safety first and quick checks

   • Turn off power at the dishwasher's breaker or unplug it. Bail out standing water with a cup and towel.
   • Make sure the sink drain is open and the garbage disposal (if present) runs freely. A clogged sink trap or disposal will stop dishwasher draining.
   • Eliminate suds. Using regular dish soap can cause suds that interfere with draining. If you see foam, add a splash of cold water and run a Cancel/Drain to clear it.

2. Force a drain and reset the control

   • On most KitchenAid models, press Cancel/Drain once to pump water out for about 2 minutes.
   • If your panel lacks Cancel/Drain, press and hold Start/Resume for 3-5 seconds to cancel the cycle and initiate a drain.
   • To run a diagnostic reset that includes a drain: press Heated Dry - Normal - Heated Dry - Normal within 6 seconds. The service cycle will start; let it run until it completes the drain segment.
   • If your model uses a 3-key sequence instead, press any 3 distinct keys in order 1-2-3, 1-2-3, 1-2-3 with less than 1 second between presses. The unit will enter diagnostics and perform a drain.

3. Clean the filter and sump

   • Remove the lower rack. Twist and lift out the round or triple filter assembly at the bottom. Rinse thoroughly under warm water and scrub away grease.
   • Inspect the sump inlet and the area around the drain cover for seeds, glass, labels, or bone fragments. Carefully remove debris.
   • Some KitchenAid units have a fine screen or chopper grate near the sump. If accessible, clean it to restore flow.

4. Check the air gap and garbage disposal knockout

   • If you have an air gap (small cap on the sink), twist off the cap and pull out the insert. Clean out sludge with a brush and flush with hot water. Reassemble firmly.
   • If a new garbage disposal was recently installed, confirm the dishwasher drain knockout plug in the disposal inlet was removed. If it is still in place, the dishwasher cannot drain. Knock it out with a screwdriver and hammer per the disposal manual, then remove the loose plug from the disposal chamber.
   • Run the disposal with water for 30 seconds to clear the branch before testing the dishwasher again.

5. Inspect and clear the drain hose (and verify a high loop)

   • Follow the drain hose from the dishwasher to the air gap or disposal. Make sure it is not kinked or crushed behind the unit.
   • Remove the hose at the sink end (place a pan under it). Try blowing through the hose or flushing it with hot water to clear grease and gunk. A turkey baster can help push hot water through the hose.
   • Reinstall with a high loop: anchor the hose to the underside of the countertop at least 20 inches above the floor, or ensure you have a code-compliant air gap. This prevents backflow into the tub.

6. Check the drain pump impeller and check valve

   • Turn off power. Remove the lower toe-kick panel. Locate the drain pump (small motor attached to the sump with a short outlet to the drain hose).
   • Feel for obstructions: detach the outlet hose at the pump and look for a rubber flapper/check valve that can stick. Clear any debris and ensure the flapper moves freely.
   • Look into the pump inlet and gently spin the impeller with a non-metal tool. If jammed by glass or hard debris, remove it. If impeller blades are broken or loose, the pump will not move water effectively.

7. Test the drain pump electrically

   • With power still off, disconnect the two wires to the drain pump. Measure resistance across the pump terminals with a multimeter.
   • A typical good pump reads roughly 20-40 ohms. If you read open (OL) or near 0 ohms, the motor is failed and should be replaced.
   • Common KitchenAid/Whirlpool drain pump part numbers include WPW10348269 (replaces W10348269) and W10876537, used on many models. Verify by your exact model number before ordering.
   • Replacement usually involves twisting the pump a quarter-turn to release from the sump and swapping the O-ring. Keep towels handy for residual water.

8. Check the float switch and water level

   • Inside the tub, locate the float (small dome or movable piece near the front corner). Lift and drop it; it should move freely and click the switch underneath.
   • A stuck float can confuse fill/drain logic and contribute to long drain errors. Clean around the float and verify the switch actuates.
   • Some models will log F6E4 (float switch open) along with drain faults if the float is stuck.

9. Read error codes and verify pump voltage

   • Models with a display may show F9E1 or 9-1 for long drain. After clearing clogs, run the diagnostic cycle (see Step 2) to clear stored errors.
   • If you can safely test live voltage: during a Cancel/Drain, the drain pump should receive ~120 VAC. If voltage is present but the pump does not run, replace the pump. If no voltage is present and wiring is intact, the control board or relay may be faulty.
   • Because control diagnosis varies by model and involves live circuits, consider professional service before replacing the control.

When to Call a Professional

Call a certified appliance technician if you see persistent F9E1/9-1 errors after the hose, air gap, and filter are cleared; the drain pump measures good resistance but does not receive power during drain; there is a burning smell, tripped breaker, or water leak from the sump area; the unit is still under parts or labor warranty; or you are uncomfortable working with electrical connections or removing the dishwasher from the cabinet to access the hose and pump.

Replacement Parts

Verify parts by your exact KitchenAid model number (found on the door frame). Use these Amazon search links and confirm compatibility before buying.

• Drain pump assembly (common: WPW10348269, W10876537) - https://www.amazon.com/s?k=KitchenAid+dishwasher+drain+pump&tag=https://www.amazon.com/s?k=KitchenAid+dishwasher+not+draining&tag=manuallogic-20
• Dishwasher drain hose with check valve - https://www.amazon.com/s?k=KitchenAid+dishwasher+drain+hose&tag=https://www.amazon.com/s?k=KitchenAid+dishwasher+not+draining&tag=manuallogic-20
• Air gap kit - https://www.amazon.com/s?k=dishwasher+air+gap+kit&tag=https://www.amazon.com/s?k=KitchenAid+dishwasher+not+draining&tag=manuallogic-20
• Filter or sump filter assembly - https://www.amazon.com/s?k=KitchenAid+dishwasher+filter&tag=https://www.amazon.com/s?k=KitchenAid+dishwasher+not+draining&tag=manuallogic-20
• Check valve flapper (e.g., WP8268375 on many units) - https://www.amazon.com/s?k=KitchenAid+dishwasher+check+valve+flapper&tag=https://www.amazon.com/s?k=KitchenAid+dishwasher+not+draining&tag=manuallogic-20
• Float switch - https://www.amazon.com/s?k=KitchenAid+dishwasher+float+switch&tag=https://www.amazon.com/s?k=KitchenAid+dishwasher+not+draining&tag=manuallogic-20
• Control board (use model-specific) - https://www.amazon.com/s?k=KitchenAid+dishwasher+control+board&tag=https://www.amazon.com/s?k=KitchenAid+dishwasher+not+draining&tag=manuallogic-20
• Hose clamps and clamp kit - https://www.amazon.com/s?k=dishwasher+hose+clamp+kit&tag=https://www.amazon.com/s?k=KitchenAid+dishwasher+not+draining&tag=manuallogic-20

Pro tip: after any repair, run a short cycle with the dishwasher empty to verify a strong, quick drain at the end of the wash. Keep the filter clean monthly to prevent repeat clogs.