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Dishwasher overflowing

01 - 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 repl...ace the water inlet valve.
Required Part
Dishwasher Water Inlet Valve
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Most Common Solution
02 - Dishwasher Main Control Board
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.
Required Part
Dishwasher Main Control Board
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Most Common Solution
03 - Dishwasher Lower Wash Arm Assembly
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.
Required Part
Dishwasher Lower Wash Arm Assembly
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Most Common Solution
04 - Wrong type or incorrect amount of detergent
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.
05 - 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.
Required Part
Dishwasher Control Board
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Common Solution
06 - Dishwasher Float Switch
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.
Required Part
Dishwasher Float Switch
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Common Solution