--- title: "Kitchenaid Dishwasher Not Draining" canonical: "https://gadgetguides.org/kitchenaid-dishwasher-not-draining/" author: "Arian" published: "2026-09-13T12:17:41+00:00" modified: "2026-09-13T12:17:41+00:00" language: "en-US" site: "Gadget Guides" description: "Alright, let's get down to it. That standing water in your KitchenAid dishwasher bottom is a moodkiller. You open the door, expecting sparkling clean…" categories: "Troubleshooting" attribution: "Gadget Guides (https://gadgetguides.org/)" --- # Kitchenaid Dishwasher Not Draining Alright, let's get down to it. That standing water in your KitchenAid dishwasher bottom is a mood-killer. You open the door, expecting sparkling clean dishes, and instead, you’re greeted by a murky pool. It’s annoying, but before you panic and picture a hefty repair bill, know this: this is one of the most common dishwasher issues, and you can probably fix it yourself. Most of the time, a dishwasher that won't drain isn't a "brain" problem. It's not the control board being difficult. It's usually mechanical: a clog, a stuck valve, or a dead pump. And mechanical problems are things you can diagnose and fix with a little guidance. We've done the legwork, combing through manufacturer service manuals and technical forums, to give you a clear, step-by-step plan. We'll walk through the main culprits, the filter, the hoses, the check valve, and the pump, in the most logical order. By the end of this, you'll either have fixed the issue or know exactly what part you need to order, saving you the cost of a service call. ![Kitchenaid Dishwasher Not Draining](https://gadgetguides.org/wp-content/uploads/2026/09/kitchenaid-dishwasher-not-draining-mtzs4jrl.webp) Image source: Bing (Web (fair-use with source credit)) ## The First 60 Seconds: A Quick Assessment Before you even think about pulling out the machine, there are a few things you can check right now. They take less than a minute and might solve the problem instantly. First, is the dishwasher actually done? It sounds obvious, but it’s easy to catch a cycle mid-wash and think there's a problem. If the machine is still running, water sits in the sump by design. Wait for the full cycle to finish, including the drying phase, then check again. If the tub is empty, you're fine. Second, force a drain cycle. Find the "Cancel/Reset" button and press it for three seconds. Listen carefully. You should hear a low humming or whirring sound as the drain pump kicks on. This tells you the pump motor is receiving power. If you hear the hum but the water isn't moving, you have a blockage. If you hear nothing but silence, the pump itself, or the switch that tells it to run, has likely failed. This one observation splits your troubleshooting path in two. Third, look for the obvious. Pull out the bottom rack and inspect the filter. Is it covered in food debris? Does the water look gritty or chunky? If it does, the filter is clogged and has likely jammed the chopper blade or blocked the sump inlet. Clear out the visible debris with a paper towel, press reset, and run the drain cycle. You might be done right there. ## The Sound Test: Your Best Diagnostic Tool That sound test when you hit reset is critical. Let's break down what you're listening for. - **A smooth, steady whir** means the pump motor is spinning and water should be moving quickly. If it's whirring but the water isn't going down, the blockage is somewhere downstream, like in the drain hose or the check valve. - **A grinding, rattling, or clicking noise** means the pump motor is trying to spin, but something is jamming the impeller (the small wheel that pulls water through). This is often a piece of glass, a small bone, or a stray piece of plastic that's wedged itself in the pump. You'll need to clear this jam. - **Silence** is the most telling. If there's no sound at all, the pump isn't getting power, which means you're dealing with an electrical issue or a completely dead motor. Also, take a look at the water itself. If it's dark, murky, and smells old, the drain cycle never ran. If the water is relatively clear with some soap suds, the wash cycle finished, but the drain was interrupted. Now, check the water level. A properly drained tub should have no standing water. If the tub is nearly full, close to the door seal, you have a massive blockage or a pump that's failed entirely. A small amount of water might indicate a partial clog or a faulty check valve letting water siphon back in. ## Step 1: Cleaning the Filter and Soil Chopper ![dishwasher filter assembly](https://gadgetguides.org/wp-content/uploads/2026/09/dishwasher-filter-assembly-mtzs4ld5.webp) Image source: Bing (Web (fair-use with source credit)) The filter is the first line of defense. It catches everything your pre-rinse missed. Over a week of normal use, this screen gets coated in a film of grease and tiny food particles that can reduce water flow enough to trigger a drain failure. We're supposed to clean this weekly, but honestly, no one does. So, let's do it now. **Safety first:** Unplug the dishwasher at the wall socket. If it's hardwired, switch off the breaker at the panel. You're going to put your hands inside the sump, and you don't want any power going to the machine. 1. Pull the bottom rack out completely. 2. Remove the filter assembly. It's usually a circular mesh screen with a twist-off cap. 3. Wash the filter under hot running water, using a soft brush to remove the film. Avoid steel wool or abrasive pads, as they'll scratch the mesh and make it easier for food particles to get trapped. 4. Look into the sump basin with a flashlight. Inspect the soil chopper, a small rotating blade inside the sump that grinds up food particles. Remove any visible debris. 5. Check if the chopper blade spins freely. If it doesn't, something is jammed. Gently work it back and forth until it rotates smoothly. 6. Reassemble the filter and run a rinse cycle to see if the water drains. ## Step 2: Clearing the Wash Arms A surprising number of "not draining" issues are actually caused by clogged wash arms. When the spray nozzles are blocked, water pressure drops. The control board detects this and cancels the cycle, leaving water in the tub that never had a chance to drain. 1. Pull out the upper and lower racks to access the wash arms. They are the spinning plastic arms with small spray nozzles. 2. Unsnap the wash arms. On most KitchenAid models, you can do this with a gentle upward tug or a quarter-turn twist. 3. Check every nozzle hole. Look for hard water scale, bits of food, or a stuck toothpick. Hold them up to a light source; if light doesn't pass through every hole, they're clogged. 4. Use a pipe cleaner or a straightened paperclip to push through every nozzle hole until the water flows freely. 5. Check the hub where the upper arm connects for scale buildup and scrub it with a toothbrush dipped in vinegar. 6. Snap the arms back into place and test again. ## Step 3: Inspecting the Drain Hose and Check Valve If your filter is clean and the wash arms are clear, the problem is likely downstream of the pump. The drain hose carries water from the pump to your sink's plumbing, and the check valve prevents it from flowing back in. ### Examining the Drain Hose A kinked or sagging drain hose is a common culprit. You'll need to pull the dishwasher out from under the counter to check this. Lay down a towel, unscrew the side mounting brackets, and slide the unit out. Look at the drain hose's path. It should loop upward as high as possible under the counter before connecting to the sink drain. This is called a high-loop installation, and it prevents water from the sink siphoning backward into the dishwasher. If the hose sags or dips downwards, secure it to the underside of the counter with a zip tie. Also, check the hose for any obvious kinks or pinches that would restrict flow. If the hose is kinked, straighten it out and secure it in a better position. ### Testing the Check Valve (Anti-Siphon Valve) If your pump runs but the water still comes back, the check valve is likely at fault. This small rubber flapper sits where the drain pump meets the drain hose. Its job is to let water out but not let it back in. When it gets stuck open due to hard water scale or a tiny piece of debris, gravity wins, and sink water siphons back into the tub. To find it, locate the connection point where the drain hose attaches to the pump outlet. Loosen the clamp and pull the hose off. You might see the valve, often a rubber disk or ball. Inspect it. If it looks warped, hardened, or held open by debris, clean it with warm water and push it back into its seated position. Make sure it moves freely and creates a seal. ## Step 4: Testing the Float Switch If you've cleared every clog and the check valve is fine, we move to testing electronic components. A multimeter is your best friend here. The float switch is a small, inverted cup or plastic bob that sits in the bottom of the tub, usually near the front-left corner. It rises with the water level and tells the control board when the tub is full enough to run the wash motor. If this switch is stuck in the "open" position, the board thinks the tub is always empty, so it never activates the drain pump. 1. Remove the bottom spray arm and the filter assembly to access the switch housing. 2. Carefully lift the float up with your fingers. It should move freely with a bit of spring resistance. If it's gritty or stuck, clean the shaft with warm, soapy water. 3. Set your multimeter to the continuity or ohms (Ω) setting. 4. Disconnect the wires from the float switch. Touch the multimeter leads to the switch terminals. 5. When the float is in the down (normal) position, the switch should show continuity (near zero ohms). When you lift the float up, it should break the circuit (infinite ohms). If it doesn't change states, the switch is bad and needs to be replaced. ## Step 5: Testing the Drain Pump Motor ![dishwasher drain pump](https://gadgetguides.org/wp-content/uploads/2026/09/dishwasher-drain-pump-mtzs4mra.webp) Image source: Bing (Web (fair-use with source credit)) We've reached the final step. If the float switch is working and the pump is completely silent, the pump motor is likely dead. Repeated heating cycles and mineral buildup can eventually burn out the motor windings, especially if the pump has been running with a jammed impeller for a while. Before you spend money on a new pump, it's wise to test the old one. The drain pump is located at the bottom center of the unit. Depending on your setup, you may need to lay the dishwasher on its back or side to access it. 1. Find the pump assembly and locate the wiring harness connected to it. Disconnect the wires. 2. Set your multimeter to the ohms (Ω) setting. 3. Touch the multimeter leads to the two power wires on the pump. 4. A healthy motor will read between 10 and 50 ohms. If you get a reading of zero (a short) or infinite (an open circuit), the motor's windings are fried, and the pump must be replaced. Order a new drain pump from a reputable appliance parts retailer. It's a standard part, but make sure you get the one specific to your model number. When the new pump arrives, installation is the reverse of removal. ## Running the Hidden Diagnostic Mode Many KitchenAid dishwashers have a diagnostic mode that can give you a specific error code, saving you from guessing. The exact sequence depends on your model, and you can find it in your owner's manual. There is a common pattern for many models manufactured after 2010. A common universal sequence on many models is: press and hold "Hi-Temp" and "Sani Rinse" simultaneously for three seconds, then press "Start". The display will show a two-digit code. You can find your model's exact sequence on the manufacturer's website. Here’s what the most common codes mean: - **F7 / E3:** Drain time-out. The drain pump ran, but the water level sensor never confirmed the tub was empty. This points to a clog or a failed pump. - **F9 / E9:** A leak in the tub or a flooded sump. Water is getting where it shouldn't, which can trip the float switch and lock out the drain cycle. - **F6 / E6:** A thermistor issue. This isn't directly a drain fault, but a sensor failure can confuse the control board and pause the cycle. ## The Final Paper Towel Test After all your hard work, you need to confirm the fix worked. Plug the dishwasher back in and run a short wash cycle with a clean tub. Let it run through the entire cycle, including the drain phase. Once it's done, open the door and check the bottom. Grab a paper towel and wipe the bottom of the tub. If it comes up dry, you've fixed the problem. If there's still water pooling, you're likely looking at a control board issue, which is more complex and might warrant a professional diagnosis. ## Preventing Future Drain Problems Once you've got it fixed, the goal is to keep it that way. Here are a few habits that will drastically reduce the odds of this happening again. - **Scrape, don't rinse.** You don't need to pre-rinse your dishes, but large food chunks, bones, and fibrous vegetables should go in the trash. A quick scrape across the sink is enough. - **Clean the filter monthly.** Set a recurring reminder on your phone. A monthly filter clean takes five minutes and costs nothing. - **Run a monthly cleaning cycle.** Place a cup of white vinegar on the top rack and run a hot cycle. Or, use an appliance cleaner tablet to break down fat and mineral buildup. - **Use rinse aid.** One jar of rinse aid lasts for months. It helps dishes dry, and, crucially, it helps keep residue from building up inside the tub. ## KitchenAid Dishwasher Not Draining: Troubleshooting Q&A **Why is my dishwasher not draining, but there’s water at the bottom?** That's the classic symptom. It means the drain phase of the cycle failed. Start with the diagnostic steps above: check the filter for a massive clog, listen for the pump during a reset, and then move down the list to the wash arms, hose, and pump. **Why is water backed up in my dishwasher?** "Backed up" usually implies a blockage. The most common cause is a clogged filter or sump. Another culprit is a kinked drain hose. Air gap issues (that cylindrical fitting on your sink) can also cause backups. If you have an air gap, check it for debris. **How do I manually drain a KitchenAid dishwasher that won't drain?** If you can't fix it right away and need to get the water out, you can bail it out with a cup, but that's messy. A better method: use a siphon hose. Submerge one end of a long hose in the standing water, fill it with water from the sink to prime it, then place the other end into a sink bucket. Gravity will pull the water out. Do not use a wet/dry vacuum unless it's rated for liquids. **Will a dishwasher drain if the garbage disposal is bad?** If your kitchen’s garbage disposal is clogged or jammed, the water from your dishwasher has nowhere to go. Before pulling your dishwasher apart, run your garbage disposal with water to ensure the sink drain is clear. If the sink itself is slow to drain, the issue might be in your house's plumbing. **Why is my dishwasher draining into the sink?** This happens when the drain hose is not installed correctly. The high loop is missing, so water flows from the dishwasher into the sink instead of the disposal. You need to purchase a dishwasher drain hose extension kit and reroute the hose. **How much does it cost to fix a dishwasher that won't drain?** It depends on the cause. Cleaning a clogged filter costs nothing. A new drain pump is typically less than $150, and it’ll take about 45 minutes to swap yourself. A technician will charge a service call fee plus parts, which easily adds up to over $200. The DIY approach saves money. **Is the drain pump the same as the circulation pump?** On some models, they're separate units. The circulation pump sprays water during the wash cycle; the drain pump pushes water out during the drain cycle. On many modern dishwashers, though, both functions are handled by one motor and pump assembly with a reversing mechanism. Check your model's parts diagram on the manufacturer's website to know which one you have. **Why is water pooling under my dishwasher?** If you see water on the floor, you have a leak, and it's probably a cracked sump or tub. The overfill float isn't designed to handle large spills. If water is leaking from the door, it's a worn door gasket. Check the gasket for tears or mildew.