A Samsung dishwasher not draining almost always comes down to a clogged filter, a blocked drain hose, or a failing drain pump. Most of the time you can find the cause in twenty minutes with a towel and a screwdriver.
What the leftover water is telling you
When the cycle ends and water sits in the bottom, the dishwasher couldn’t push it out. The water pools around the sump, the low point under the bottom rack. On a Samsung, that standing water usually means the drain path is blocked or the pump can’t move it.
Samsung often flags this with an error code. A drain fault shows up as 5C, 5E, or SC on most models, and these all point to the same problem: water isn’t leaving fast enough. You may also see OC, which means the tub is over-level with too much water inside. Different model, same story. Something downstream of the pump is restricted.
Start with the filter and sump
Samsung dishwashers do not self-clean the way some brands claim. They use a filtered sump, and that filter catches food, grease, and grit on every cycle. When it clogs, water backs up.
Twist out the cylindrical filter at the bottom center of the tub. Rinse it under hot water and scrub the mesh with a soft brush. Then look into the sump well underneath. Pull out any glass, seeds, or sludge with a paper towel. In San Diego, hard-water scale binds with grease and forms a paste right here, so clean it more often than the manual suggests. If you want the brand-agnostic version of this routine, our guide on a dishwasher not draining walks through it step by step.
Run a forced drain first
Before you take anything apart, try to clear the standing water. Press Cancel or Start Cancel and let the dishwasher run its drain-out, which takes a minute or two. If it drains, your problem may be a one-time clog. If the water stays, the path is blocked and you’ll need to dig in.
Check the drain pump and its debris cover
The drain pump sits below the sump and does the actual pushing. On many Samsung models you remove the bottom filter, then lift off a small pump cover to reach the impeller. Shut the power off at the breaker first. With the cover off, look for a chip of glass, a bone, or a twist tie jamming the blades. Spin the impeller by hand. It should turn freely. If it’s seized or the motor stays silent during the drain step, the pump itself has likely failed.
A small check valve sits near the pump outlet too. It stops drained water from flowing back. Scale and grease can stick it shut, and a stuck valve traps water in the tub.
Inspect the hose, air gap, and disposer knockout
Follow the drain hose from the dishwasher to under the sink. It should rise to a high loop near the top of the cabinet, or connect to an air gap on the counter. That loop keeps sink water from siphoning back into the tub. If the hose sags or kinks, water can’t climb out.
If the dishwasher was installed recently and never drained right, check the garbage-disposal knockout plug. New disposals ship with a solid plug in the dishwasher inlet. If the installer forgot to knock it out, the dishwasher has nowhere to drain. Clear the air gap of debris while you’re under there too.
When the door or control board is the culprit
A drain cycle won’t finish if the dishwasher thinks the door is open. A worn door latch or a faulty door switch can abort the cycle mid-run and leave water behind. Less often, the main control board fails to signal the pump. These point to a repair rather than a cleaning. Our overview of Samsung appliance repair in San Diego covers when a part swap makes sense over a full replacement.
What you can do yourself versus when to call
Cleaning the filter, clearing the sump, checking the pump cover, fixing a kinked hose, and knocking out a disposer plug are all reasonable do-it-yourself jobs. You need a towel, a screwdriver, and a little patience.
Call a qualified technician when the pump is seized, the check valve is stuck, the door switch has failed, or the board isn’t firing the pump. These need a meter to test and the right replacement part. A professional repair service can confirm the fault in one visit instead of guessing at parts. Our dishwasher repair page covers what a visit looks like across San Diego County.
Frequently asked questions
Why is my Samsung dishwasher not draining?
The most common causes are a clogged filter, a blocked or kinked drain hose, a jammed drain pump, or a stuck check valve. Start with the filter and sump, since that fixes most cases.
What does the 5C or 5E code mean on a Samsung dishwasher?
Both codes signal a drain fault. The dishwasher tried to pump out water and couldn’t, usually because of a clog in the filter, hose, or pump. Clear the blockage and the code clears.
Can hard water cause my Samsung dishwasher to stop draining?
Yes. San Diego’s hard water leaves scale that combines with grease in the filter and check valve. Over time that buildup restricts the drain path and slows or stops drainage.
When to call us
If you’ve cleared the filter, hose, and disposer knockout and water still pools, the pump or check valve likely needs service. Call us at (858) 988-7787 for a same-day estimate.