Samsung Dishwasher Not Draining? (here’s why & what to do)

If you own a Samsung dishwasher and it fails to drain, you need to fix it fast. Not only will there be dirty water left in the bottom of the tub, but the dishes will not clean and there’s the potential for a flood.

However, it’s not all bad news, in many cases the problem can easily be solved by anyone with just a small amount of DIY knowledge. 

In this article we identify all of the probable causes for your Samsung dishwasher not draining, as well as offer solutions to those problems many of which are simple and will not require any outside assistance.

How To Remove Dirty Water From A Dishwasher

Before you can start acting on any of the solutions featured in this article, you will first need to remove any stagnant water. We have found 2 ways to do this depending on how much standing water there is.

  1. Scoop The Water Out Using A Jug
    If there is only a small amount of water left in the bottom of the tub, this is the best method for removing it. You will need to lay a towel on the floor to absorb any spillage and then using a jug, scoop the water from the tub. Any residue that is too low for the jug to reach can be dealt with using a towel or other absorbent material.
  2. Use A Wet/Dry Vacuum
    If there is a substantial amount of standing water in the tub, use a wet/dry vacuum to remove it. Remember to put the wet filter in place in your vacuum before you start.

Why Is The Samsung Dishwasher Not Draining?

There are several reasons why the Samsung dishwasher could fail to drain which include;

Possible CauseSolution
Overloaded DishwasherEnsure dishes are stacked correctly and the racks are not overloaded
Clogged FilterClean the filter
Clogged Drain HoseInspect the drain hose and remove any blockage
Blocked Waste Disposal UnitRemove any blockage 
Blocked Air GapInspect the air gap and remove any blockage
Defective Drain SolenoidInspect and replace the drain solenoid if necessary
Defective Check ValveInspect the check valve and replace if necessary
Faulty Drain PumpInspect the drain pump and replace if necessary

Let’s take a closer look at each of these issues;

Overloaded Dishwasher

loading a dishwasher

If you overload the dishwasher with dishes, plates, pots and pans, it’s possible to obstruct the spray arms. This will prevent the water from circulating correctly.

This can lead to stagnant water remaining in the dishwasher after the cycle has finished. Always ensure you load the dishwasher according to the manufacturer’s recommendations.

Consult your user manual for more information on how to correctly load your Samsung dishwasher.

Clogged Filter

The filter on a Samsung dishwasher is designed to trap any food particles or other debris and prevent them from returning to the dishes and protect the internal components of the appliance from damage.

Over time, the filter can become clogged with food and other debris especially if it isn’t cleaned regularly. You will need to remove the filter and then clean it under a fast running tap.

For really stubborn stains, try soaking the filter in a bowl of warm soapy water or a 50/50 white vinegar and water solution. You could also scrub really stubborn patches using a toothbrush.

Clogged Drain Hose

All of the waste water from your dishwasher exits through the drain hose. If the drain hose becomes blocked or clogged, it can lead to flooding, leaking and dirty dishes.

You will need to inspect the drain hose for any twists or kinks before removing it from the dishwasher after disconnecting the power supply. Once removed, you can run the drain hose under a fast running tap or use a plumber’s snake to free any blockage.

Once you’re sure the hose is clear, replace it onto the dishwasher ensuring to tighten the clamps sufficiently. You should also ensure there are no twists or kinks in the drain hose.

Blocked Waste Disposal Unit (If Applicable)

If your dishwasher is connected to a waste disposal unit, the unit could be blocked causing the dishwasher to fail to drain. Try running the waste disposal unit for around 30 seconds to see if it clears.

If the unit is stuck and doesn’t move, you can manually turn the grinders using an allen key. All you need to do is place the correct allen key into the socket and turn it backwards and forwards until the movement feels less restricted.

Blocked Air Gap (If Applicable)

If your dishwasher is connected to an air gap to prevent dirty water from syphoning back into the appliance it could be blocked. Over time food particles, fat, grease and even limescale can build up and cause a blockage.

You can check the air gap by removing the cover and the cap and looking inside. Any blockages can be removed using a pair of tweezers. 

You should then use a bottle brush to remove as much debris as you can.

Defective Drain Solenoid


The drain solenoid receives messages from the control unit on when to open to allow waste water to exit the dishwasher. If the solenoid becomes defective, it could fail to open or fail to close after opening.

If it fails to open, it will mean all of the waste water will remain in the dishwasher. If it fails to close it will allow dirty water to flow back into the appliance.

The drain solenoid will need to be tested for continuity using a multimeter. If it proves to be faulty, it will need to be replaced.

As the drain solenoid is located at the bottom of the appliance and access can only be gained after dismantling parts of the dishwasher, we recommend getting a technician to do this for you. 

Defective Check Valve

The check valve or flapper as it is sometimes called, is a device that allows water to leave the dishwasher but prevents it from returning. If the check valve becomes damaged or develops a fault, it will need to be replaced.

This is another task best left to a technician as the check valve is difficult to access and unless you know what you’re looking for, it could be difficult to tell whether it is damaged or not.

Faulty Drain Pump

The drain pump is responsible for pumping all of the waste water from the appliance. There are a few components on the drain pump that could be defective including the impeller.

The impeller creates low water pressure which sucks the water from the tub. It then forces that water into the drainage system. The impeller could become clogged with food particles, fat or grease. In some cases, the blades on the impeller can become damaged.

The pump could also become clogged or a seal within the pump could fail. Inside the drain pump there is also a motor that could have failed. 

As the pump is difficult to access, we recommend getting a technician to inspect and replace the pump if necessary.

SEE ALSO: Samsung Dishwasher Touchpad Not Working

Frequently Asked Questions

Why is my Samsung dishwasher leaving water in the bottom?

If your Samsung dishwasher is leaving water in the bottom it could be because; you have overloaded the racks with dishes that are incorrectly stacked, the filter is blocked, the drain hose is clogged, the waste disposal unit is clogged, the air gap is clogged, the drain solenoid is defective, the check valve is faulty or the drain pump is defective.

Why is my Samsung dishwasher not draining and humming?

If your Samsung dishwasher isn’t draining but is making a humming noise, it could be because the drain pump impeller is obstructed. You can often access the impeller by removing the filter and looking into the filter housing. Remove any blockage and try the dishwasher again.

What does a broken dishwasher drain pump sound like?

A broken dishwasher drain pump often makes a loud buzzing sound which often then becomes progressively louder and changes to a squealing noise as the problem gets worse.

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