If your Kenmore dishwasher is overflowing, start with the most likely cause: a failing water inlet valve. When this valve does not shut off properly, the dishwasher can overfill, leave the water level too high, or let water drip into the tub even when the machine is off. The next most likely issue is the main control board, or control board, sending power to the water inlet valve longer than it should. A cracked lower wash arm assembly can also mimic a Kenmore dishwasher overflowing problem by forcing water out near the bottom of the door. After that, check for too much or the wrong detergent, since oversudsing can look a lot like a dishwasher overfills with water condition. Finally, inspect the float switch, which is designed to stop a dishwasher overflowing if the water level gets too high. If your Kenmore dishwasher water level is too high, enter your model number on RepairClinic.com to find the exact replacement part for your specific dishwasher, whether you need a water inlet valve, main control board, lower wash arm assembly, control board, or float switch.
01 - Kenmore 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 - Kenmore 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.