A dishwasher not draining is usually dealing with a clogged filter, debris near the drain pump, a blocked or kinked drain hose, or a problem at the sink connection. Start by removing the standing water, cleaning the filter, and checking the drain path before assuming the pump has failed.
Why Is My Dishwasher Not Draining and How to Fix It comes down to finding where water stops moving: inside the tub, in the hose, or at the disposal or sink drain. The checks below work for many brands, but your model’s manual is the final word on filter removal, reset steps, and access panels.
Safety first: Turn the dishwasher off at its breaker or unplug it before reaching into the sump area or moving hoses. Never put your hand into standing water around an appliance that may still have power.
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At the end of a cycle, the drain pump pushes used water from the sump area at the bottom of the tub through a drain hose. That hose normally joins the sink plumbing, a garbage disposal, or an air gap near the faucet.
The filter or drain basket catches food particles before they reach the pump. A filter packed with residue slows water movement, while a small object such as glass, a label, or a seed can jam the pump impeller below it.
The hose should rise in a high loop under the counter before dropping to the sink connection. This raised section helps stop dirty sink water from flowing back into the dishwasher.
Quick clue: Water that remains only in the dishwasher points first to its filter, pump area, or hose. Water that rises into the sink while the dishwasher drains points more strongly to a sink-drain or disposal restriction.
Standing water at the bottom of a dishwasher means the drain path is restricted or the pump is not moving water. The most likely causes are easy to inspect, so work from the tub outward instead of taking the machine apart immediately.
Many people do not realize their dishwasher has a removable filter because it sits beneath the lower spray arm or lower rack. Grease, soft food, paper labels, and mineral film can coat its mesh and reduce drainage.
A dishwasher draining slowly, rather than refusing to drain completely, often has a partly clogged filter. A sour odor is another common sign that residue has been sitting in the filter or sump area.
After lifting out the filter, look into the sump area with a flashlight. Broken glass, bones, twist ties, fruit pits, and pieces of plastic can sit by the pump cover or prevent the impeller from turning.
A humming or buzzing sound during the drain portion of a cycle can mean the pump has power but cannot move freely. Do not force the impeller or reach past a cover unless your appliance manual says that access is user-serviceable.
The drain hose runs from the dishwasher to the sink cabinet, and items stored under the sink can pinch it. A low loop, sharp bend, or hose crushed behind the machine can leave water at the bottom of the dishwasher even when the filter is clean.
Grease and food residue may also build up inside the hose. You can inspect the visible under-sink portion without pulling the dishwasher out, but disconnecting a hose requires a bucket, towels, and the power turned off.
If the problem began right after a garbage disposal was installed or replaced, the dishwasher inlet’s knockout plug may still be in place. This small removable plug blocks the disposal’s dishwasher port until it is knocked out during installation.
An air gap is the small cylinder near some kitchen faucets that protects against backflow. Food residue can clog its cap or internal passage, and water may spill from it while the dishwasher tries to drain.
A sluggish kitchen sink can restrict the same pipe used by the dishwasher. Run water in the sink and watch for slow draining or water backing up when the dishwasher begins its drain cycle.
The dishwasher cannot discharge properly into a blocked branch drain. In that situation, cleaning the dishwasher filter alone will not solve the water-at-bottom problem.
If the filter, hose, disposal connection, and sink drain are clear, the drain pump motor or its check valve may be defective. A silent pump during a drain command can also involve wiring, a door latch issue, a thermal protection device, or the control board.
These faults need model-specific testing with power isolated. They are good reasons to stop the DIY process rather than replace parts by guesswork.
Work through the least invasive checks first. Keep towels nearby, and take a photo of hose routing before disconnecting anything under the sink.
Close the door and use the control marked Cancel, Drain, Start/Reset, or a similar label for your model. Many machines start a drain cycle when that button is held for about three seconds, although the exact command varies.
Listen for the pump and watch the tub for movement. If it drains fully, run a short rinse cycle afterward and check whether the problem returns.
Disconnect power, remove the lower rack, and scoop water into a shallow bowl or cup. A turkey baster, sponge, or wet/dry vacuum can remove the last water from the bottom of the tub.
Do not use a household vacuum that is not rated for liquids. Put towels along the door opening because water can shift forward as you work.
Lift out the lower rack, then unlock and remove the filter according to your manual. Rinse it under warm running water and use a soft brush for its mesh and grooves.
Do not jab the mesh with a knife or metal pick. If mineral deposits are present, soak the removable filter in warm, soapy water and brush it gently before reinstalling it securely.
Do this first: Community repair discussions repeatedly point to filter cleaning as the first successful fix. It is quick, low-risk, and it reveals whether food particles have reached the sump area.
With the filter out, use a flashlight to inspect the drain well and the area around any removable pump cover. Pick out only loose debris you can clearly see and safely reach.
Check the cover is seated correctly before reassembling. If you find broken glass or cannot identify a part in the opening, stop and consult the manual or a technician.
Look under the sink for a kinked hose, a loose clamp, or heavy objects pressing on the hose. Confirm that the hose rises to a high loop or uses the air gap before it joins the plumbing.
Remove and rinse the air-gap cap if your sink has one, then clear visible debris from the opening. If a disposal was newly installed, check with the installer or disposal instructions that the dishwasher knockout plug was removed.
When you disconnect a drain hose for flushing, place a bucket beneath the connection and have towels ready. Refit the hose firmly, route it without a kink, and check the connection for leaks during the next drain test.
Once the filter and drain path are clear, restore power and try the manufacturer’s reset procedure. Many models reset by holding Cancel or Start/Reset, while others need power turned off at the breaker briefly before restarting.
Do not treat a reset as a cure for a physical clog. Run a short cycle after the reset and listen for a normal drain sound near the end.
Warning: Do not pour chemical drain cleaner into a dishwasher or its hose. It can damage appliance parts, create dangerous splashes when a line is opened, and will not remove an object caught in the pump.
Call an appliance technician if the pump does not run after the basic checks, a pump repeatedly hums without draining, or you see damaged wiring, a burn smell, or a leak from the machine. A technician can test the drain pump motor, check valve, door switch, and control circuit safely.
Call a plumber when the kitchen sink or disposal backs up, the shared drain line is slow, or the dishwasher drain connection needs plumbing changes. This split matters because a clear dishwasher cannot drain into a blocked household pipe.
Renters should avoid altering fixed plumbing or removing access panels if the lease assigns repairs to management. Document the standing water and any error code before reporting it.
Scrape large food particles from dishes before loading, especially bones, peels, labels, and toothpicks. Check the filter regularly and clean it whenever you see residue or notice lingering odors.
Keep the space under the sink from pressing against the drain hose. After moving cleaning supplies or installing a disposal, take a moment to confirm the hose still has its high loop and no sharp bend.
Hard water can leave mineral buildup on filters and in the tub. Follow your appliance manual’s cleaning guidance and use the recommended dishwasher cleaner or cleaning cycle at the suggested interval for your water conditions.
A clogged filter is the most common cause. Food particles, grease, labels, and mineral residue can block the filter or collect in the sump area, restricting water before it reaches the drain pump. Clean the removable filter first, then inspect the visible pump area and drain hose.
Standing water means the dishwasher cannot move water through part of its drain path. Check the filter and sump area first, then look for a kinked hose, a blocked air gap, a disposal knockout plug left in place, or a slow kitchen sink drain.
Close the door and use the Cancel, Drain, or Start/Reset command listed for your model; many dishwashers begin a drain cycle when the button is held for about three seconds. If it does not drain, disconnect power, remove the standing water, and inspect the filter and drain path instead of repeating the command.
After clearing physical blockages, use the reset procedure in your model manual. This may mean holding Cancel or Start/Reset, or switching power off at the breaker briefly before restoring it. A reset can clear a stalled program, but it cannot clear a clogged filter, hose, or pump area.
When a dishwasher is not draining, begin with the cancel/drain command, remove standing water safely, clean the filter, and inspect the visible sump and under-sink hose route. Check the sink, air gap, and disposal connection before assuming an internal part has failed.
Why Is My Dishwasher Not Draining and How to Fix It is best handled in that order because it starts with the common, low-risk causes. If water still remains after those checks, stop using the dishwasher and arrange the right appliance or plumbing repair.