Why your Samsung dishwasher isn't draining and what to do first
Water pooling at the bottom of your Samsung dishwasher usually means one of three things: the drain hose is kinked or clogged, the drain filter is blocked, or the drain pump has failed. Most of the time it's the filter or hose, and you can fix it yourself in under an hour without tools beyond a sponge and a flashlight.
Before you start, turn off power to the dishwasher at the circuit breaker. This protects you if you need to work near the pump or electrical connections. Then open the door and scoop out standing water with a cup or sponge—you'll need clear access to the filter at the bottom.
Key Takeaways
- The drain filter at the bottom of your Samsung dishwasher catches food and debris; a clogged filter is the most common reason water won't drain.
- The drain hose running from your dishwasher to the sink or garbage disposal can kink behind the unit or get blocked by food buildup inside.
- You can clear most clogs by removing and rinsing the filter, straightening the hose, and running hot water through it.
- If water still pools after the filter and hose are clean, the drain pump may have failed and you will need to call a repair technician.
Locate and clean the drain filter
The drain filter sits at the bottom of your Samsung dishwasher, usually in the rear corner. It looks like a cylindrical cage or basket, sometimes with a handle or knob on top. Once you've emptied standing water, locate it by looking at the floor of the tub—you may need a flashlight to see clearly.
Twist the filter counterclockwise to unscrew it, or pull straight up if yours has a handle. Rinse it under hot running water and use your fingers or an old toothbrush to scrub away food, grease, and mineral buildup. Pay special attention to the mesh sides—debris often gets trapped there. If the filter is cracked or the mesh has holes, it needs to be replaced; contact Samsung support for the correct part number for your model.
Once clean, screw the filter back in clockwise until it's snug, or push it down until it seats. Don't force it—hand-tight is correct. Run a short rinse cycle to see if water drains now.
Check and clear the drain hose
The drain hose is a rubber or plastic tube that runs from the bottom of your dishwasher to either your kitchen sink's drain or your garbage disposal. It can kink behind the dishwasher, get pinched by the cabinet, or develop a clog inside. Start by pulling the dishwasher out slightly and looking at the hose where it exits the unit—straighten any obvious kinks.
If the hose is kinked but won't straighten, or if water still won't drain after cleaning the filter, you may need to disconnect it. Turn off the water supply to the dishwasher first. Locate where the hose connects at the sink end (usually under the sink) and loosen the clamp with a flathead screwdriver. Disconnect the hose and hold it over a bucket, then pour a kettle of hot water through it to flush out debris. If water doesn't flow freely, use a plumbing snake or straightened wire coat hanger to push the clog through.
Reconnect the hose, tighten the clamp, and run a test cycle. Make sure the hose doesn't loop upward before it reaches the drain—it should slope downward the entire way, or water will collect inside it.
Inspect the drain pump and motor
If the filter is clean and the hose is clear but water still pools, the drain pump may be stuck or broken. The pump is located under the filter basket and is harder to reach, but you can check for obvious blockages. With the filter removed, shine a flashlight into the pump chamber and look for food, glass, or plastic fragments wedged in the impeller (the spinning part inside).
If you see something, use needle-nose pliers or tweezers to remove it carefully. Do not force anything—you can damage the impeller. Once you've removed any visible debris, reinstall the filter and run a test cycle.
If the pump chamber is clear but water still won't drain, the pump motor itself has likely failed. This is not a repair you should attempt yourself—the pump is wired directly to the control board and requires professional removal and replacement. Contact a Samsung-authorized repair service or a local appliance technician.
Check the air gap or garbage disposal connection
If your drain hose connects to a garbage disposal, make sure the disposal is working and not clogged. Run it with hot water to clear any buildup. If the hose connects to an air gap (a small cylindrical fitting on your sink or countertop), remove the cap and look inside—it should be clear. If it's clogged, use a straightened wire or small brush to clean it out.
Some Samsung models have a check valve in the drain line that prevents water from flowing backward. If this valve is stuck closed, water can't drain. You'll see it as a small one-way flapper inside the hose connection. If you suspect it's stuck, disconnect the hose at the sink end and manually work the flapper back and forth with your finger or a small tool.
Run a diagnostic drain cycle
After cleaning the filter and hose, run your dishwasher on a short rinse or drain cycle with the door open so you can watch what happens. Listen for the pump to set up—you should hear a humming sound a few seconds after the cycle starts. If you hear nothing, the pump motor may not be receiving power.
If the pump runs but water still doesn't drain, the blockage is likely deeper in the line or the pump itself is faulty. If the pump makes noise but doesn't sound normal—grinding, squealing, or rattling—stop the cycle when ready and call a technician. Continuing to run a damaged pump can cause more expensive problems.
When to call a repair technician
Call a professional if the filter and hose are clean but water still won't drain, or if the pump makes unusual noises. You should also call if you find cracks in the filter housing, damage to the pump chamber, or a cracked hose that's leaking water inside your cabinet.
A Samsung-authorized technician can test the pump motor with a multimeter, replace the pump assembly if needed, and check the control board to make sure it's sending the drain signal correctly. Repair costs vary, but a pump replacement typically runs between $200 and $400 including labor, depending on your model and your location.
Frequently Asked Questions
Can I use vinegar or baking soda to unclog the drain?
Vinegar and baking soda can help dissolve mineral buildup and grease inside the hose, but they work best as a preventive step, not a fix for standing water. Pour a cup of baking soda down the drain opening, follow it with a cup of white vinegar, wait 30 minutes, then run hot water through. This won't clear a physical blockage, but it can help if the hose is partially clogged by buildup.
What if water is leaking from under the dishwasher instead of pooling inside?
A leak from underneath usually means the drain hose has cracked or the connection is loose. Check under the sink for water and trace the hose to find the leak. If the hose is cracked, it needs to be replaced—you can order one from Samsung or a parts supplier. If the connection is just loose, tighten the clamp with a screwdriver.
How often should I clean the drain filter?
Rinse the filter under hot water once a month, or more often if you don't rinse dishes before loading them. Food and grease buildup is the most common cause of slow draining, so regular cleaning prevents problems. If you notice water draining slowly even with a clean filter, the hose may need flushing.
Can I run the dishwasher with standing water in the bottom?
No. Running the cycle with standing water can damage the pump and motor, and the dirty water will recirculate over your dishes. Always empty the tub first by scooping out water with a cup or sponge, then diagnose and fix the drain before running another cycle.
Is it normal for a small amount of water to stay at the very bottom?
A few drops or a thin film of water is normal—the pump can't remove every last drop. If you see a quarter-inch or more of water pooling, or if it's still there hours after the cycle ends, the drain is not working properly and needs attention.