If your Whirlpool dishwasher is overflowing, start with the most likely cause: a water inlet valve that is stuck open or not shutting off when the tub reaches the right fill level. That can lead to a Whirlpool dishwasher overfills with water condition, standing water in the bottom, or even water collecting when the machine is not running. Next, check the main control board, since a board that keeps sending power to the water inlet valve can also cause dishwasher overflowing. A cracked lower wash arm assembly is another common cause because it can spray water toward the door and make a Whirlpool dishwasher water level too high problem look like an overflow. After that, consider using the wrong detergent or too much detergent, which can create oversudsing and leaking, then inspect the control board and the float switch or safety float if the dishwasher overflowing issue continues. On RepairClinic.com, you can enter your model number to find the exact Whirlpool replacement part for your dishwasher, whether you need a water inlet valve, main control board, lower wash arm assembly, control board, or float switch.
01 - Whirlpool 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 - Whirlpool 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.