A Samsung dishwasher that won't drain usually shows a 5E, 5C, or OE code and comes down to a clogged filter, drain hose, or drain pump. Standing water at the bottom is the tell — and the filter is the first, easiest thing to clean.
The known Samsung issue: A brand-new disposal with the knockout plug left in is a shockingly common "dishwasher won't drain" cause on Samsung installs — check that first if it started after a disposal swap.
What's actually different about a Samsung
Clogged filter Easy
The bottom filter clogs with food and blocks the drain.
What you can check: Pull the bottom rack, twist out the filter cup, rinse it under the tap. Do this monthly.
Kinked/clogged drain hose or air gap Moderate
The hose to the disposal/standpipe clogs, or a new disposal's knockout plug was never removed.
What you can check: If recently paired with a new disposal, confirm the knockout plug was removed.
Drain pump Pro
A hum with standing water points at the pump.
What you can check: Technician replacement.
Samsung dishwasher fault codes
5E / 5C / OE
Drain error — clean filter, check hose and pump
Try this first: Unplug or trip the breaker for 1 minute after cleaning the filter, then run a short cycle.
Get the exact Samsung part — shipped to your door
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Water in the bottom of the dishwasher after a cycle is a classic — and usually simple — problem. A lot of the time it's something you can clear in a few minutes, especially if a new garbage disposal was just installed. Here are the causes in the order we check them.
Safety first: Turn the dishwasher off at the breaker before reaching near the drain pump. Scoop out standing water with a cup and towel first.
Clogged filter or sump Easy
Food, grease, and debris build up in the filter at the bottom of the tub and block drainage. This is the most common cause and an easy clean.
What you can check: Remove the bottom rack, twist out the filter, and rinse it under hot water. Clear any debris in the sump.
Garbage disposal knockout plug Moderate
If a new garbage disposal was recently installed and the dishwasher won't drain, the installer likely forgot to knock out the drain plug inside the disposal inlet. Extremely common.
What you can check: Check under the sink — if a new disposal went in recently, the knockout plug may need to be removed from the disposal's dishwasher inlet.
Clogged or kinked drain hose Moderate
The hose from the dishwasher to the disposal or standpipe can clog or kink.
What you can check: Check the hose under the sink for kinks. A deep clog is a technician clear-out.
Drain pump Pro
The pump that pushes water out can fail or jam with glass or debris.
What you can check: A humming pump with no draining points here. Replacement is a technician repair.
Check valve stuck Pro
A one-way valve keeps drained water from flowing back; if it sticks, drainage suffers.
What you can check: Not a typical DIY check. Diagnosed by a technician.
Is it worth repairing?
The vast majority of dishwasher drain problems are cheap fixes — a filter clean, a knockout plug, or a hose. Even a drain pump is an affordable part. A dishwasher that won't drain is almost always worth repairing.
Frequently asked questions
Why is my Samsung dishwasher won't drain?
A Samsung dishwasher that won't drain usually shows a 5E, 5C, or OE code and comes down to a clogged filter, drain hose, or drain pump. Standing water at the bottom is the tell — and the filter is the first, easiest thing to clean.
Is there a known issue with Samsung dishwashers won't drain?
A brand-new disposal with the knockout plug left in is a shockingly common "dishwasher won't drain" cause on Samsung installs — check that first if it started after a disposal swap.
Why is there water at the bottom of my dishwasher?
A small amount is normal; a full pool after a cycle means it didn't drain. The usual causes are a clogged filter, a garbage-disposal knockout plug that was never removed, a kinked drain hose, or a failed drain pump.
I just got a new garbage disposal and my dishwasher won't drain — why?
This is very common. New disposals ship with a knockout plug in the dishwasher inlet that must be removed during installation. If it was missed, the dishwasher can't drain into the disposal. Removing the plug fixes it.
Can I fix a dishwasher that won't drain myself?
Often yes — cleaning the filter and checking the disposal knockout are safe, simple steps. If the drain pump has failed or there's a deep clog, that's a technician repair.