Standing dirty water after the cycle
Water is pooled across the bottom instead of just a thin film near the sump.
Start here: Start with the filter, sump well, and any debris around the drain opening.
Dishwasher Drain Problem
Whirlpool Dishwasher Not Draining
Direct answer: If your Whirlpool dishwasher is not draining, the most common cause is a blockage in the filter, sump, drain hose, or sink air gap rather than a failed internal part.
Most likely: Start with any standing water in the tub, then check the dishwasher filter area and the full drain path to the sink. If the machine hums or tries to drain but water stays put, think clog first.
A little clean water left in the sump can be normal. A pool of dirty water covering the bottom, a sour smell, or water backing up after the cycle is not. Reality check: most no-drain calls end up being debris in the filter or a kinked hose. Common wrong move: running cycle after cycle with standing water and hoping it clears itself.
Don’t start with: Don’t start by ordering a dishwasher drain pump. On this symptom, a plugged drain path is more common than a bad pump.
If you hear draining but the water level barely changes,look for a clogged filter, air gap, or drain hose before suspecting the pump.
If the dishwasher is silent at the drain portion of the cycle,check for a cancel-drain response first, then consider a drain pump or control issue.
Last reviewed: 2026-04-17
What the drain failure looks like
You hear a hum or drain sound but water stays
The machine sounds like it is trying to pump out, but the tub level barely drops.
Start here: Check the drain hose, sink air gap if you have one, and the sink-side connection for a clog.
No drain sound at all
At the drain portion of the cycle, the dishwasher goes quiet or just sits there with water inside.
Start here: Try a cancel or drain command first. If there is still no pump sound, the drain pump may not be running.
Water comes back after it seemed to drain
The tub empties some, then water reappears later, or the sink backs up when the dishwasher drains.
Start here: Look for a blocked sink drain, clogged air gap, or a drain hose routed too low or kinked.
Most likely causes
1. Clogged dishwasher filter or sump area
Food scraps, labels, glass bits, and grease collect where the dishwasher pulls water out first. That is the most common place to lose drainage.
Quick check: Remove the lower rack and inspect the filter area for sludge, paper, seeds, bones, or broken glass.
2. Blocked or kinked dishwasher drain hose
A partial clog lets the pump run but not move enough water. A kink or crushed section can stop flow almost completely.
Quick check: Follow the dishwasher drain hose from the unit to the sink connection and look for sharp bends, pinches, or a packed hose end.
3. Clogged sink air gap or sink-side drain connection
If the dishwasher drains into an air gap or garbage disposal inlet, that restriction can hold water in the dishwasher even when the pump is fine.
Quick check: If water spits from the air gap or backs into the sink during drain, clear the air gap and the sink-side hose connection.
4. Failed dishwasher drain pump
When the drain path is clear but the dishwasher will not push water out, or the pump only hums and never moves water, the pump becomes the likely fault.
Quick check: After clearing the filter and hose path, run cancel or drain and listen for a strong pump sound and steady discharge into the sink plumbing.
Step-by-step fix
Step 1: Confirm it is really a drain problem, not normal leftover water
A shallow puddle near the sump can be normal on some dishwashers. You want to separate that from a true no-drain condition before taking things apart.
- Open the dishwasher after the cycle has fully ended, not mid-cycle.
- Look at the bottom of the tub with the lower rack pulled out.
- If water is spread across the whole bottom or deep enough to touch the filter housing, treat it as a drain problem.
- If the water is dirty, cloudy, or smells sour, that also points to poor draining rather than normal residual water.
- Try a cancel or drain command and listen for whether the dishwasher attempts to pump out.
Next move: If the dishwasher drains normally on cancel or drain, the issue may have been a one-time interruption or a partial clog that is still worth checking. If water remains or the dishwasher never tries to drain, keep going with the drain-path checks below.
What to conclude: You are confirming whether you have a real blockage or pump issue instead of chasing a normal small water pocket.
Stop if:
- Water is hot enough to burn you.
- You see exposed damaged wiring, melted plastic, or signs of arcing.
- The dishwasher is leaking onto the floor while you test it.
Step 2: Clean the dishwasher filter and check the sump for debris
This is the highest-payoff check on a dishwasher that leaves water behind. Debris at the filter or sump can choke off drainage fast.
- Turn off power to the dishwasher at the breaker or unplug it if the plug is accessible.
- Scoop out standing water with a cup or towel so you can see the bottom clearly.
- Remove the lower spray arm only if needed for access, then remove the dishwasher filter per the normal twist or lift arrangement.
- Wash the dishwasher filter with warm water and mild dish soap. Use a soft brush only if needed.
- Look down into the sump area for labels, glass, toothpicks, seeds, or grease buildup and remove what you can safely reach.
- Reinstall the dishwasher filter securely so it seats flat and locks in place.
Next move: If the dishwasher drains after cleaning the filter and sump, the blockage was at the tub side and you are likely done. If it still leaves water, the restriction is probably farther along the drain path or the pump is not moving water.
What to conclude: A dirty dishwasher filter is the most common cause. If cleaning it changes nothing, move downstream toward the hose and sink connection.
Step 3: Check the sink air gap and sink-side drain connection
A dishwasher can be perfectly fine and still not drain if the discharge point at the sink is blocked. This is especially common when the sink drains slowly too.
- If your sink has an air gap on the countertop, remove the cap and clean out any sludge or food debris inside.
- Run the sink and make sure it drains normally. A slow sink can hold the dishwasher water back.
- Look under the sink where the dishwasher drain hose connects to the disposal or sink tailpiece.
- Place a towel underneath, loosen the hose clamp, and inspect the inlet for grease or packed debris.
- If the dishwasher was recently installed and connected to a garbage disposal, make sure the disposal knockout was removed.
- Reconnect the hose securely and make sure there are no leaks.
Next move: If the dishwasher now drains and the air gap no longer spits water, the blockage was on the sink side. If the sink side is clear and the dishwasher still will not empty, inspect the dishwasher drain hose itself next.
Step 4: Inspect the dishwasher drain hose for kinks or a clog
A drain hose can look fine from the front and still be pinched behind the machine or packed with grease near one end. That will mimic a bad pump.
- Turn power off again before moving the dishwasher or reaching into tight spaces.
- Follow the dishwasher drain hose as far as you can from the dishwasher to the sink connection.
- Look for a crushed section, sharp bend, sagging loop, or hose routed too low.
- Disconnect the hose at the sink side and check whether debris is packed into the end.
- If needed, remove the hose and flush it through with water at a sink or outside until it runs clear.
- Reinstall the dishwasher drain hose without kinks and keep a proper high loop under the counter if your setup uses one.
Next move: If the hose was blocked or kinked and the dishwasher now drains strongly, the hose was the problem. If the hose path is clear and the dishwasher still will not pump water out, the drain pump is the main suspect.
Step 5: Test the drain response and decide between pump replacement and service
By this point you have ruled out the common clogs. Now you are listening for what the drain pump is actually doing and deciding whether the repair is still straightforward.
- Restore power and run a cancel or drain command with the dishwasher reassembled enough to operate safely.
- Listen for a strong, steady drain sound and watch the sink-side hose or air gap area for discharge.
- If the dishwasher is silent during drain, or only gives a low hum with little or no water movement, the dishwasher drain pump is likely failing or jammed.
- If the pump runs strongly but water still does not leave, recheck for a missed restriction in the hose path or sink connection.
- If you are comfortable opening the lower access area and checking for an obvious pump obstruction, disconnect power first and proceed only if access is simple and dry.
- If the pump branch fits and the drain path is confirmed clear, replace the dishwasher drain pump or schedule service.
A good result: If a new or cleared pump restores a strong drain, run a full cycle and verify the tub finishes nearly dry except for a small normal sump pocket.
If not: If a clear drain path and a working pump still do not solve it, the problem is beyond the easy homeowner checks and needs appliance service.
What to conclude: A silent or humming no-drain dishwasher with a clear drain path usually lands on the drain pump. If the diagnosis is still muddy, stop before buying more parts.
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FAQ
Why is there water in the bottom of my Whirlpool dishwasher after the cycle?
A small amount near the sump can be normal. A broad pool of dirty or smelly water usually means the filter, sump, drain hose, air gap, or sink-side connection is restricted.
How do I know if my dishwasher drain pump is bad?
If the filter and full drain path are clear and the dishwasher is silent during drain or only hums without moving water, the drain pump becomes the likely fault. If it drains strongly once the clog is cleared, the pump was probably fine.
Can a clogged sink keep a dishwasher from draining?
Yes. If the sink drain, air gap, or disposal inlet is blocked, dishwasher water may back up, drain slowly, or stay in the tub even though the dishwasher itself is trying to pump out.
Should I run the dishwasher again to clear standing water?
Usually no. Repeated cycles rarely fix a real blockage and can leave more dirty water and odor behind. It is better to clear the filter and drain path first.
What if my dishwasher drains sometimes but not every time?
That usually points to a partial clog, not a fully failed part. Check for debris in the filter, a grease-heavy restriction in the hose, or a sink-side blockage that only shows up when a lot of water moves at once.