What does a dishwasher float switch do?

It's a safety device that monitors the water level inside the dishwasher tub. When the water reaches a predetermined level, the float rises and activates the switch, signaling the control board to stop the water inlet valve, preventing overfilling and potential leaks.

How can I tell if my float switch is bad?

Common signs include the dishwasher overfilling or not filling at all, or leaking water from the bottom. Sometimes, the dishwasher may display a specific error code related to water level issues, indicating a potential float switch malfunction.

Is it difficult to replace a dishwasher float switch?

Replacing a float switch is generally considered a moderate difficulty repair. It often requires pulling the dishwasher out from under the counter and accessing components from the bottom. While it doesn't typically involve complex wiring or specialized tools, careful handling is necessary.

Dishwasher Float Switch Replacement

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W10195039 Dishwasher Float Switch（2 Pack) Fit for Whirlpool KitchenAid Maytag Dishwasher WPW10195039 MS10-06 PS11750031

The package includes 2 pieces of the W10195039 dishwasher float switch.
The W10195039 switch serves as a replacement for AP6016738, PS11750031, W10734532, and WPW10195039.
The WPW10195039 switch is compatible with Whirlpool, KitchenAid, Maytag, Amana, Jenn-Air, and Inglis brands.
In the event that the water level exceeds the designated limit before the scheduled water fill cycle concludes, the WPW10195039 float switch will close the water inlet valve.
Tools required for installation: Phillips-head screwdriver, flat-head screwdriver.

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What the W10195039 does

The float switch is a safety device that monitors the water level in the dishwasher tub. It signals the control board to stop the water inlet valve once the desired water level is reached, preventing overfilling.

Symptoms when this part fails

Dishwasher overfills with water
Dishwasher does not fill with water
Water leaks from the bottom of the dishwasher
Dishwasher displays water level error codes

Compatibility

Fits the Whirlpool family. Specifically:

Any unit originally equipped with OEM part number(s): W10195039.
Check the model/rating plate inside your appliance and compare it against the fitment table on the product listing before ordering — this guide does not list specific compatible models because Amazon does not provide verified fitment data through this pipeline.

Tools you'll need

Screwdriver (Phillips and/or flathead)
Pliers
Towel
Multimeter (optional)

Difficulty: Moderate · Time: 30-60 minutes

How to install the W10195039, step by step

Disconnect power to the dishwasher at the circuit breaker.
Turn off the water supply valve to the dishwasher.
Remove the lower access panel or toe kick.
Locate the float switch assembly, typically near the bottom of the tub.
Disconnect electrical wires from the old switch.
Remove any mounting screws or clips securing the old switch.
Install the new float switch, connecting wires and lines as removed.
Reinstall access panels, restore water and power, then test the dishwasher.

Related troubleshooting

If swapping this part doesn't fix the issue, check these next: