What causes a dishwasher float switch to fail?

Float switches can fail due to mineral buildup, debris obstructing the float's movement, or electrical contact issues. Wear and tear over time can also lead to a malfunction, preventing it from accurately sensing water levels or sending the correct signal to the control board.

Can I clean a dishwasher float switch instead of replacing it?

Sometimes, cleaning a float switch can resolve issues if the problem is caused by debris or mineral buildup preventing the float from moving freely. However, if the electrical contacts are faulty or the switch mechanism is broken, cleaning may not be sufficient, and replacement would be necessary.

Where is the float switch typically located in a dishwasher?

The float switch is usually located at the bottom of the dishwasher tub, often near the front or side. It's connected to a small plastic float that rises with the water level. Access often requires removing the lower access panel or tilting the dishwasher.

Dishwasher Float Switch Repair Guide & Symptoms

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🏆 RECOMMENDED PART

Bosch 00622036 Dishwasher Float

The 00622036 is a genuine OEM Bosch Float .
The Bosch 00622036 Float fits the following brands of dishwashers: Bosch, Thermador, Gaggenau
The Bosch 00622036 rises with the water level, activating the float switch to shut off the water supply if the water level gets too high.
The 00622036 replaces: 622036
It is recommended to either refer to your appliance service manual, contact your appliance manufacturer, or contact a service professional to validate the needed part number for your appliance prior to purchasing.

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What the 00622036 does

The float switch is a safety device that detects high water levels in the dishwasher tub. It prevents overfilling by shutting off the water inlet valve if water rises too high.

Symptoms when this part fails

Dishwasher overfills with water
Dishwasher does not fill with water
Dishwasher leaks from the bottom
Dishwasher stops mid-cycle
Error code related to water level

Compatibility

Fits the Bosch family. Specifically:

Any unit originally equipped with OEM part number(s): 622036.
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.

Also replaces: 622036

Tools you'll need

Screwdriver (Phillips and/or flathead)
Pliers
Towel
Work gloves

Difficulty: Moderate · Time: 30-60 minutes

How to install the 00622036, step by step

Disconnect power to the dishwasher.
Shut off the water supply valve.
Remove the lower access panel or toe kick.
Locate the float switch assembly.
Disconnect wires and water lines if necessary.
Remove the old float switch.
Install the new float switch and reconnect everything.
Restore power and water, then test for leaks.