Table of Contents >> Show >> Hide
- First, a 60-Second Reality Check (Before You Start Taking Things Apart)
- Samsung Dishwasher Not Draining: The 5 Best Troubleshooting Tips
- Tip #1: Check the easy “external” causes first (hose routing, kinks, and the high loop)
- Tip #2: Clean the filter and drain area (the #1 cause of “mystery puddles”)
- Tip #3: Clear the air gap (or the “little sink volcano”)
- Tip #4: Inspect the garbage disposal connection (hello, knockout plug)
- Tip #5: If it still won’t drain, focus on the drain pump and check valve
- Common Scenarios (So You Can Diagnose Faster)
- How to Prevent Samsung Dishwasher Drain Problems (Future You Says Thanks)
- Conclusion
- Bonus: 500+ Words of Real-World “Not Draining” Experiences (So You Feel Less Alone)
Your Samsung dishwasher has exactly one job after the wash: get the swamp out.
So when you open the door and discover a lukewarm puddle that looks like it’s auditioning
for a nature documentary, it’s fair to feel personally attacked.
The good news: most “Samsung dishwasher not draining” problems come down to a handful of
usual suspectsclogs, kinks, backflow, or a tired drain pump. The better news: you can
check a lot of them in under an hour with a towel, a flashlight, and the kind of determination
usually reserved for assembling furniture with missing instructions.
Sources: 1,2,4,5,7,8,9,11,12,13
First, a 60-Second Reality Check (Before You Start Taking Things Apart)
1) Confirm it’s really “not draining,” not “a little normal water”
Many dishwashers keep a small amount of water in the sump area to keep seals from drying out.
But if you’re seeing standing water across the bottom, dirty water returning after it “drains,”
or your cycle stops with a pool you could float a grape inyep, that’s a drainage issue.
Sources: 5,7,11
2) Try the built-in drain/cancel function
On many models, pressing Cancel/Drain runs the drain pump to evacuate water.
If you haven’t tried it yet, do that firstit’s the dishwasher equivalent of “turn it off and on again,”
but with more gurgling.
Sources: 2,7
3) Don’t skip safety (water + electricity = bad vibes)
- Turn off power at the breaker if you’ll be reaching near wiring or removing panels.
- Lay towels under the front edge and keep a shallow pan handy.
- If there’s a lot of standing water, scoop it out with a cup or use a wet/dry vac.
Sources: 2,9
Samsung Dishwasher Not Draining: The 5 Best Troubleshooting Tips
Tip #1: Check the easy “external” causes first (hose routing, kinks, and the high loop)
Samsung support notes that drain issues are often caused by installation or hose problems.
Translation: your dishwasher may be fineit’s the path to the sink that’s throwing a tantrum.
Sources: 1
What you’re looking for
- Kinked drain hose behind the dishwasher or under the sink
- Crushed hose (happens when the dishwasher is shoved back too aggressively)
- No high loop (hose should rise up under the counter to reduce backflow)
Sources: 1,4,11
Quick fix steps
- Pull the dishwasher out a few inches (carefully) and look for pinched hose sections.
- Under the sink, follow the hose to where it connects to the disposal or drain pipe.
- Make sure the hose rises as high as possible under the countertop before going down.
If your dishwasher drains, then refills with dirty water later, that “backflow” symptom often points
to a missing high loop, a clogged disposal/sink drain, or a check valve issue.
Sources: 4,7,11,13
Tip #2: Clean the filter and drain area (the #1 cause of “mystery puddles”)
If your Samsung dishwasher isn’t draining, the filter is where you should place your suspicion first.
Filters collect food particles, labels, toothpicks, and the occasional pasta that died a heroic death.
When that debris builds up, water can’t flow properly toward the drain.
Sources: 5,10,12
How to do it (without making it weird)
- Remove the lower rack.
- Twist and lift out the filter assembly (most are a simple turn-lock design).
- Rinse with warm water and scrub gently with a soft brush.
- Wipe the sump area underneathlook for glass shards, seeds, or “mystery crunchy bits.”
- Reinstall the filter snugly (loose filters can cause poor wash performance and drainage drama).
Sources: 5,10,12
Pro tip: If your dishwasher suddenly started draining poorly after a week of “we don’t need to rinse plates,”
congratulationsyou found the cost of that lifestyle.
Tell-tale signs you nailed it
- Water starts draining normally after a Cancel/Drain test
- No more funky odor coming from the bottom
- Your dishwasher stops making the sound of a blender eating gravel
Sources: 2,5,7,12
Tip #3: Clear the air gap (or the “little sink volcano”)
If you have an air gap (that small cylinder near the faucet), a clog there can stop draining
or cause water to burp onto the countertop like it’s protesting your detergent choices.
Retailer how-to guides and plumbing pros commonly point to air gaps as an overlooked culprit.
Sources: 3,4,8,9,11,13
How to clean it
- Pop off the air gap cover.
- Remove the cap and inspect for gunk.
- Use a small brush or tweezers to clear debris.
- Run a short rinse/drain cycle to test.
Sources: 3,8,9
If you don’t have an air gap, you still need a proper high loop. One of themnot necessarily both
helps prevent dirty water from flowing backward into the dishwasher.
Sources: 4,11
Tip #4: Inspect the garbage disposal connection (hello, knockout plug)
This one is so common it deserves its own trophy: if your dishwasher is connected to a garbage disposal,
there may be a knockout plug inside the disposal inlet that must be removed during installation.
If it’s still there, your dishwasher can’t drainbecause it’s literally trying to drain into a wall.
Sources: 6,9,11
When this is likely
- Your disposal was recently installed or replaced
- The dishwasher worked “once or twice,” then started holding water
- You hear the drain pump run, but nothing leaves the tub
Sources: 6,7,11
What to do
- Turn off power to the disposal.
- Disconnect the dishwasher drain hose from the disposal inlet (have a towel ready).
- Check for a plastic plug inside the inletif present, it must be knocked out and removed.
- Reconnect the hose and test a drain cycle.
Sources: 6,9,11
Also check the obvious: a clogged disposal, a backed-up sink drain, or a blocked P-trap can prevent the dishwasher
from draining because everything shares the same plumbing pathway.
Sources: 9,13
Tip #5: If it still won’t drain, focus on the drain pump and check valve
If the hose is routed correctly, the air gap (if present) is clear, and the filter is clean, your next suspects
live inside the machine: the drain pump and the check valve.
Appliance repair guides commonly cite these as top causes when external clogs aren’t the issue.
Sources: 7,8,13
Drain pump: what it does and how it fails
The drain pump uses an impeller to push water out through the drain hose. When it’s jammed by debris, you may hear
humming, grinding, or a strained “I’m trying my best” noise. When it’s electrically failed, you might hear nothing
at all during the drain portion of a cycle.
Sources: 8,7
Quick checks (DIY-friendly)
- Listen: During Cancel/Drain, do you hear the pump run?
- Look: Any debris in the sump area that could jam the impeller?
- Observe: Does water drain out, then creep back in (possible check valve/backflow)?
Sources: 2,7,8,13
About Samsung drainage error codes
Some Samsung dishwashers display information codes for water-related problems. On certain models, codes such as
5C/5E are associated with drainage issues and often point back to hoses, clogs, or the pump.
If you see a code, treat it as a cluenot a life sentence. Model behavior varies, so consult your specific manual.
Sources: 14
When to stop DIY and call a pro
If you’ve cleared clogs, confirmed correct hose routing, and the dishwasher still won’t drainor if you suspect a pump,
check valve, or control issuethis is where a qualified appliance technician earns their keep.
Electrical testing (like continuity checks) and internal disassembly are doable, but they’re also where small mistakes
turn into big water-on-floor events.
Sources: 7,8,9
Common Scenarios (So You Can Diagnose Faster)
Scenario A: “It drains slowly, but never fully.”
- Likely: partially clogged filter, drain hose restriction, or gunked-up air gap
- Try: deep-clean filter + check hose for kinks + clean air gap
Sources: 3,5,8,11,12
Scenario B: “It drains… then dirty water comes back.”
- Likely: missing high loop, disposal/sink drain backup, or check valve issue
- Try: fix hose routing, clear disposal/sink drain, inspect check valve with a tech if needed
Sources: 4,7,9,11,13
Scenario C: “I hear the pump, but nothing moves.”
- Likely: blockage at disposal connection (including knockout plug) or a clogged hose
- Try: inspect disposal inlet, remove blockage, flush hose
Sources: 6,7,11
Scenario D: “No sound during drain. Just… silence.”
- Likely: pump failure, wiring issue, or control problem
- Try: basic reset and checks; then call a pro for electrical diagnosis
Sources: 7,8,9
How to Prevent Samsung Dishwasher Drain Problems (Future You Says Thanks)
- Clean the filter regularly. If you don’t, it will eventually return the favor by clogging at the worst time.
- Scrape, don’t rinse. Big chunks belong in the trash, not the sump.
- Run hot water at the sink before starting a cycle if your kitchen line runs cool at first.
- Keep the disposal clear if your dishwasher drains through it.
- Check hose routing after any under-sink work. One bumped loop can become a drain nightmare.
Sources: 4,5,9,11,12,13
Bonus: 500+ Words of Real-World “Not Draining” Experiences (So You Feel Less Alone)
Let’s talk about the part nobody puts in the glossy brochure: drainage problems are often less about “broken” and more about
“the world is messy and spaghetti exists.” The most common experience homeowners describe starts like this: the dishwasher was
fine yesterday, then today there’s water sitting in the bottom like a tiny reflective pool of regret. The instinct is to assume
the worstpump failure, expensive parts, dramatic repair bills. In reality, the boring answer wins a lot: the filter is clogged.
Here’s a classic pattern: someone hosts friends, runs multiple loads, and the last cycle ends with standing water. Why the last one?
Because that’s when the filter finally hits peak gunk capacity. A few grains of rice here, a couple spinach leaves there, and suddenly
the sump is basically running a composting side hustle. People pull the filter and are shocked by what they findespecially if they’ve
never cleaned it before. The “aha” moment usually happens when the next test cycle drains perfectly and everyone acts like they personally
invented plumbing.
Another real-life favorite: the garbage disposal knockout plug. This one shows up after a kitchen upgrade or disposal replacement.
The dishwasher used to drain fine, then suddenly it doesn’tyet the machine still washes, and you can hear it trying to drain. Under the sink,
everything looks connected, so the homeowner cleans the filter, runs vinegar, presses Cancel/Drain three times, and negotiates with the universe.
The fix ends up being a plastic plug sitting inside the disposal inlet like an uninvited bouncer. Remove it, reconnect the hose, and the dishwasher
drains like nothing ever happened. The emotional whiplash is real.
Air gaps deserve their own “experience” category because they fail in such a theatrical way. When an air gap clogs, you might not just get a dishwasher
that won’t drainyou might get a countertop geyser. People describe it as “the sink accessory started spitting water,” which is both accurate and deeply rude.
The funny part is that the fix can be anticlimactic: pop the cap, pull out debris, clean it, done. The not-funny part is cleaning up the water after the air
gap has expressed its feelings.
Then there are the slow-burn stories: the dishwasher drains, but not well, and there’s always a little stinky water hanging around. These experiences often
trace back to hose routingno high loop, a sagging hose, or a gradual buildup in the drain line. People notice gurgling, funky smells, or water that seems to
“return” after draining. Fixing the high loop and clearing the shared plumbing (sink/disposal) can make the dishwasher feel brand new without touching any internal
parts. It’s the kind of win that makes you want to brag to your group chat, even if nobody asked.
Finally, the true “call-a-pro” experiences: no drain sound, repeated error codes, or a drain pump that hums but can’t move water. These are the cases where a tech’s
diagnostic tools and experience matter. And honestly? Knowing when to stop is a skill. If you’ve worked through the basics in order, you’ll call for service with
confidence, describe symptoms clearly, and avoid paying for someone to “discover” a kinked hose you could have fixed in five minutes.
Sources: 2,4,5,6,7,8,9,11,12,13,14
