Samsung Dishwasher Standing Water in Bottom - Causes & Fix

Samsung Dishwasher Standing Water in Bottom — What’s Happening

Standing water in the bottom of a Samsung dishwasher is a drainage fault. The machine is not removing water fast enough or at all, and many Samsung models will display a drain-related error code such as 5C, 5E, OC, or OE when this happens. These codes indicate the dishwasher has detected that water is not draining within the expected time or that an overflow condition tied to drainage is present.

The problem is usually mechanical, not electronic. Something is physically blocking the flow of water out of the tub, or a component in the drain path has failed. The dishwasher pumps water out through a filter, into a drain pump, past a check valve, and then through a hose to your household drain. Any restriction in that chain leaves water sitting in the sump at the end of a cycle.

Jump to Fix

Most Likely Causes

• Clogged filter or sump debris Food particles, broken glass, or other debris in the bottom filter assembly or sump pit block water from reaching the drain pump, and this is the most common cause reported by Samsung support and field technicians.
• Kinked, pinched, or blocked drain hose The drain hose running from the dishwasher to the sink or disposal can be bent, pinched during installation, or clogged internally, preventing water from leaving the machine.
• Blocked sink drain, garbage disposal, or air gap If the household drain, disposal, or air gap is restricted or plugged, the dishwasher cannot discharge water even if its own components are working normally.
• Drain pump obstruction or failure The drain pump impeller can jam on debris or the pump motor can fail electrically, stopping the pump from moving water out of the tub.
• Faulty or stuck check valve A check valve that sticks open or closed, or is blocked by debris, can prevent proper discharge or allow water to flow back into the tub after the pump stops.
• Disposal knockout plug not removed If a garbage disposal was recently installed and the dishwasher drain knockout plug inside the disposal inlet was not punched out, water cannot leave the dishwasher.
• Incorrect drain hose routing or missing high loop Samsung installation guidelines require a high loop or air gap in the drain hose to prevent backflow from the sink, and improper routing can allow siphoning or backflow into the dishwasher.

How to Diagnose and Fix

1. Check the sink drain and garbage disposal first by running water at the sink and confirming it drains quickly, and if an air gap is installed look for water discharging from it during a dishwasher drain cycle.
2. If a garbage disposal was recently installed, confirm the dishwasher knockout plug inside the disposal inlet was removed.
3. Pull the lower dish rack, remove the lower spray arm if needed, and take out the filter assembly, then inspect the sump pit for any debris, food, glass, or foreign objects and clean thoroughly.
4. Disconnect the drain hose at both the dishwasher and the sink or disposal connection, inspect for kinks or pinches along the entire length, and flush the hose with water to clear any internal blockage.
5. Access the drain pump from the lower front panel or base area, check the impeller by hand for debris or jamming, and confirm it spins with normal magnetic resistance rather than spinning completely free.
6. Test the drain pump motor electrically with a multimeter across its terminals, looking for a resistance reading in the range of tens to low hundreds of ohms rather than infinite resistance which indicates an open winding.
7. Inspect the check valve near the pump outlet for debris, sticking, or damage, and verify it opens freely in the drain direction and closes to prevent backflow.
8. Verify the drain hose has a proper high loop or air gap per Samsung installation guidelines to prevent siphoning or backflow from household plumbing.

Parts You Might Need

Related Error Codes

If your appliance also shows a code on the display, these match this problem:

• Samsung Dishwasher 3C error code
• Samsung Dishwasher 3E error code
• Samsung Dishwasher 4C error code
• Samsung Dishwasher 5C error code
• Samsung Dishwasher 9E error code
• Samsung Dishwasher Ap error code
• Samsung Dishwasher Be error code
• Samsung Dishwasher Ce error code
• Samsung Dishwasher Hc error code
• Samsung Dishwasher He error code
• Samsung Dishwasher Lc error code
• Samsung Dishwasher Le error code

When to Call a Pro

If you have cleared the filter and sump, verified the sink drain is open, inspected the hose for kinks and blockage, and water still will not drain, the problem is likely the drain pump or check valve. Accessing the pump and valve requires removing the lower panel or base and working in a confined space with electrical connections and plumbing. If you are not comfortable testing electrical components with a multimeter, disassembling the base, or handling the pump and valve replacement, call an appliance repair technician. A pro can also diagnose wiring faults, control board issues, or model-specific routing problems that are harder to spot without service documentation.