If your Gaggenau dishwasher is overflowing, start with the most likely cause: a faulty water inlet valve. When the water inlet valve does not shut off fully, the dishwasher can overfill, leave the dishwasher water level too high, or let water collect in the tub even when the machine is off. The next most likely issue is the main control board, or control board, continuing to send power to the valve when it should stop. In some cases, what looks like a dishwasher overflowing is actually water spraying out from a cracked lower wash arm assembly and leaking near the door. It is also worth checking for too much detergent or the wrong type of detergent, since oversudsing can mimic an overfill problem. After that, inspect the float switch, which is designed to stop the fill if the water gets too high. If your Gaggenau dishwasher overfills with water or has a dishwasher float switch problem, enter your model number on RepairClinic.com to find the exact replacement part that fits your dishwasher.
01 - Gaggenau 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 - Gaggenau 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.