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Samsung Dishwasher Not Draining: Causes, Fixes and Troubleshooting Guide 2026
A Samsung dishwasher not draining can leave standing water in the bottom of the tub, produce unpleasant odors, interrupt a wash cycle, or trigger a drain-related error code. Fortunately, many drainage problems are caused by relatively simple issues such as a clogged filter, blocked sink drain, kinked drain hose, or debris around the sump or drain pump.
Samsung’s current troubleshooting guidance recommends checking the sink connection, drain hose, dishwasher filter and drain area before requesting professional service. The exact filter design and troubleshooting procedure can vary between Samsung dishwasher models, so your model-specific manual should always take priority.
Why Is My Samsung Dishwasher Not Draining?
There are several possible reasons a Samsung dishwasher may stop draining properly. The most common are related to blockages or restricted water flow.
Food particles can collect in the dishwasher’s filter and sump area, preventing water from reaching the drain system efficiently. A drain hose can also become kinked, bent, compressed, or blocked, particularly underneath the kitchen sink.
The problem may actually be outside the dishwasher. A clogged sink drain or garbage disposal can prevent wastewater from leaving the dishwasher. Samsung also notes that a recently installed garbage disposal may still have its knockout plug in place, which can block the dishwasher’s drain connection.
If the dishwasher has recently been installed, incorrect drain-hose routing is another possibility. Depending on local plumbing requirements, the hose may need an air gap or high loop to help prevent wastewater from flowing backward into the dishwasher.
Check the Sink, Garbage Disposal and Drain Hose
Before taking apart the dishwasher, inspect the sink drainage system.
Run water into the sink for about 30 seconds. If the sink itself drains slowly or remains full, the problem may be with the home’s plumbing rather than the dishwasher. Samsung recommends contacting a plumber when the connected sink does not drain properly.
If your dishwasher drains through a garbage disposal, check that the disposal is clear of food waste and that it is not clogged. If the disposal was recently installed, verify that the dishwasher connection’s knockout plug was removed.
Next, inspect the dishwasher’s drain hose underneath the sink. Look for:
- Kinks or sharp bends
- A hose compressed by the dishwasher
- Damage or cracks
- An incorrectly positioned connection
- Missing or improperly formed high loop
- A blocked hose connection
A restricted hose can prevent water from being pumped out even when the dishwasher itself is operating normally.
Clean the Samsung Dishwasher Filter and Sump
A dirty filter is one of the first things to check when a Samsung dishwasher is not draining.
During normal operation, dishwasher filters capture food particles and other debris. Over time, residue can accumulate around the filter and sump area, restricting drainage.
Turn off the dishwasher and follow the cleaning instructions in your model’s user manual. Depending on the model, the filter assembly may contain coarse, main, and fine filtering components. Samsung advises cleaning removable filters under running water and using a soft brush when appropriate.
After cleaning, make sure every filter is correctly reassembled and seated. Samsung specifically warns that incorrectly installed or missing filter components can contribute to drainage problems.
Never operate a dishwasher without its required filters installed.
When checking the sump, use protective gloves and be careful because broken glass, sharp objects, bones, or other debris may be present.
Check the Drain Pump for Debris
If the filter and hose appear clear but the dishwasher still will not drain, the drain pump may contain debris or have a mechanical problem.
Some Samsung models provide access to the drain-pump area beneath the filter. Samsung’s guidance for applicable models includes removing the lower rack and filter, removing water around the filter area, and inspecting the pump and impeller for foreign objects or damage.
Common debris can include pieces of food, labels, plastic fragments, glass, or other small objects.
Do not force components or disassemble parts that your model’s manual does not identify as user-serviceable. If the pump appears damaged or does not operate correctly after basic troubleshooting, professional service may be necessary.
A 3C pump operation error, for example, indicates a pump-related problem in Samsung’s current error-code guidance. Samsung recommends restarting the appliance once, and if the problem remains, requesting service.
Samsung Dishwasher Drain Error Codes
Samsung dishwashers can display different information codes depending on the model and region. For drainage problems, commonly encountered codes include 5C, 5E, SC, and SE.
These codes generally indicate that the dishwasher is having difficulty draining. Samsung recommends checking the drain connection, hose, filter, and sump.
Some newer Samsung guidance also identifies 5C2 as a condition in which the dishwasher attempts to drain but the pump fails to start, runs briefly, or stalls. In that situation, Samsung recommends disconnecting power before inspecting the sump for debris that could be interfering with the pump impeller.
Another important distinction is the 1E/IE code on certain Samsung models. Samsung associates this with a clogged filter condition on some Waterwall models and recommends cleaning the fine filter.
Because error codes can vary by model, always check the manual for your exact dishwasher model number before performing model-specific procedures.
What to Do If There Is Still Standing Water
A small amount of water can sometimes remain in parts of a dishwasher’s drainage system, but significant standing water after a completed cycle deserves investigation.
Start by checking the simplest causes:
- Inspect the sink drain.
- Check the garbage disposal, if connected.
- Inspect the drain hose for kinks and blockage.
- Clean the dishwasher filter.
- Inspect the sump and drain area for debris.
- Check the drain pump if your model permits safe access.
- Look for the dishwasher’s error code or flashing-light pattern.
- Run another appropriate cycle or drain operation after completing the checks.
If the dishwasher still refuses to drain, the cause could involve the drain pump, electrical components, plumbing connection, sensor system, or another internal component.
Samsung’s current support guidance recommends requesting professional service when the basic troubleshooting steps do not resolve the problem.
How to Prevent a Samsung Dishwasher From Not Draining
Regular maintenance can reduce the chance of recurring drainage problems. The most useful habit is keeping the filter and drain area clean.
Remove obvious food particles from dishes before loading them, particularly large pieces that could reach the filtration system. Periodically inspect the filter and clean it according to the instructions for your model.
Also check the area underneath the sink from time to time. Make sure the drain hose remains properly positioned and free of kinks. If plumbing work or a garbage-disposal replacement has recently occurred, verify that the dishwasher connection was installed correctly.
Avoid putting your hands into the drain area without protection, because sharp debris can be hidden beneath standing water or around the filter.
If you live in an area where freezing temperatures are possible, consider whether the water or drain line may be frozen. Samsung advises warming the affected area when freezing is suspected and contacting a plumber if the problem persists.
Final Thoughts on a Samsung Dishwasher Not Draining
When a Samsung dishwasher not draining, the solution often begins with a basic inspection rather than an immediate component replacement. A clogged filter, dirty sump, blocked sink, garbage-disposal issue, or kinked drain hose can all interfere with wastewater removal.
Start with the external plumbing, then inspect the hose and clean the dishwasher’s filter and drain area. If your model allows it, inspect the drain pump for foreign objects. Pay attention to codes such as 5C, 5E, SC, SE, 5C2, and 3C, but always confirm their meaning for your particular model and region.
If basic troubleshooting does not restore normal drainage, avoid repeatedly running the appliance with standing water. Professional Samsung service or a qualified appliance technician can determine whether the problem involves the drain pump, plumbing, wiring, sensors, or another internal component.
With regular filter cleaning, proper drain-hose routing, and attention to the sink connection, many common drainage problems can be identified early and prevented from becoming more serious.