If your Samsung dishwasher is overflowing, overfills with water, or the water level gets too high, start with the most likely cause: a faulty water inlet valve. When this valve does not shut off fully, water can keep entering the tub and lead to a Samsung dishwasher overflowing even when the cycle should stop. Next, check the main control board, since a shorted board can keep sending power to the water inlet valve during the wash or drain cycle. A damaged lower wash arm assembly can also mimic a dishwasher overflowing problem by spraying water out the bottom of the door. After that, consider whether too much detergent or the wrong detergent is causing oversudsing and leaks, then inspect the control board and the float switch or safety float, which should stop the fill if the water level gets too high. If your dishwasher water level is too high or you suspect a dishwasher float switch problem, RepairClinic.com can help you track down the issue and find the exact Samsung replacement part. Enter your model number to get parts that fit your specific dishwasher.
01 - Samsung Dishwasher Water Inlet Valve
The water inlet valve is an electrically-controlled valve that opens to allow water to enter the dishwasher. Depending on the model, the valve stays open either for a set length of time or until the dishwasher has enough water. However, if the water inlet valve doesn’t shut off after the dishwasher has enough water, the dishwasher will overflow. If water drips into the dishwasher when the door is open, or if water collects at the bottom of the dishwasher while it is not use, you may need to replace the water inlet valve.
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A dishwasher's main control board provides power to nearly every electrical component in the dishwasher. If the control board continues to send power to the water inlet valve during the drain cycle, the dishwasher could overflow. While this is not that common of a problem, you can inspect the board for signs of burning or a shorted-out component. You can also use a multimeter to test the water inlet valve for incoming power during the dishwasher's cycle.
If the lower wash arm has a crack or split on the side it can cause water to splash out the bottom of the door, giving the impression that the dishwasher is overflowing. Inspect the wash arm assembly for any damage and replace if necessary.
Make sure to use the proper dishwasher detergent. Use the proper amount of detergent for your water hardness; too much soap in soft water can cause oversudsing and leaking.
Common
05 - Samsung Dishwasher Control Board
A dishwasher's control board provides power to nearly every electrical component in the dishwasher. If the control board continues to send power to the water inlet valve the dishwasher could overflow. While this is not that common of a problem, you can inspect the board for signs of burning or a shorted-out component. You can also use a multimeter to test the water inlet valve for incoming power during the dishwasher's cycle.
The float switch actuates in order to prevent the dishwasher from overflowing. If the float switch is defective or stuck, it might not stop the dishwasher from overflowing. If the float switch is defective, replace it.