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Jenn Air Dishwasher overflowing

If your Jenn Air dishwasher is overflowing, the most likely culprit is a water inlet valve that is stuck open and keeps letting water in after the tub is full. That is especially likely if you notice water dripping in with the door open or standing water collecting when the dishwasher is off. The next most likely cause is the main control board continuing to send power to the water inlet valve when it should shut off, followed by a cracked lower wash arm assembly that can throw water toward the door and mimic a dishwasher overfills with water problem. Too much detergent or the wrong detergent can also create excess suds and make a Jenn Air dishwasher overflowing issue look worse. A defective or stuck float switch is another possible cause if the dishwasher water level is too high and the safety float system is not cutting off the fill. Check each part carefully, and if replacement is needed, enter your model number on RepairClinic.com to find the exact Jenn Air water inlet valve, main control board, lower wash arm assembly, or float switch that fits your dishwasher.

01 - Jenn Air 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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02 - Jenn Air 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.
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03 - Jenn Air 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.
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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.
Common

05 - Jenn Air 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.
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Common

06 - Jenn Air 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.
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Common

Frequently Asked Questions

Why is my Jenn Air dishwasher overflowing?
How do I tell if the water inlet valve is causing my Jenn Air dishwasher to overfill?
Can a float switch cause a Jenn Air dishwasher to overflow?
My Jenn Air dishwasher is leaking from the door. Is it really overflowing?
How do I find the right overflow-related part for my Jenn Air dishwasher?

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