What causes a dishwasher float switch to fail?

A float switch can fail due to mineral buildup, debris obstructing the float's movement, electrical contacts becoming corroded or worn, or physical damage to the float mechanism. These issues prevent it from accurately sensing the water level.

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

In some cases, mineral buildup or debris can be cleaned off the float and its housing to restore function. However, if the electrical contacts are damaged or the mechanism is physically broken, replacement is usually necessary for reliable operation.

Where is the float switch located in a dishwasher?

The float switch is typically located at the bottom of the dishwasher tub, often under the lower spray arm or near the heating element. It has a small plastic float that rises with the water level to activate the switch.

Dishwasher Float Switch Repair Guide | Appliance Aid

Appliance Aid takes part in the Amazon Associates programme. Some links on this page are affiliate links, and a qualifying purchase earns us a commission. Your price is unchanged.

🏆 RECOMMENDED PART

154773201 Dishwasher Float Switch Assembly Fits For Frigidaire Dishwasher

【Replaces Cross Reference Part Numbers】:154773201,AP4982393,154209801,154386601,154408701,1864244,AH3492842,EA3492842,PS3492842
【Compatible With】:This Part Fits The Following Brands And Possibly Others:Crosley,Frigidaire,Gibson,Kelvinator,Tappan,White Westinghouse
【Fits For】:FDB1100RHB2A,FDB1100RHB3B FDB1100RHC2A,FDB1100RHC3B FDB1100RHM2A,FDB1100RHM3B FDB1100RHQ2A,FDB1100RHQ3B FDB1100RHS2A,FDB1100RHS3B FDB1450CHB4A,FDB1450CHS4A FDB1502RGB4A,FDB1502RGM4A FDB1502RGQ4A,FDB520RHB3A...
【Easy Installation】:Direct replacement part for a quick and seamless repair
【Quality Service】:If you have any questions with the product,Please contact us in a timely manner.GIBACAD will provide you with the most quality service

Check Price on Amazon

What the 154773201 does

The float switch in a dishwasher detects the water level in the tub. It signals the control board to stop filling when the desired level is reached, preventing overfilling.

Symptoms when this part fails

Dishwasher overfills
Dishwasher does not fill with water
Dishwasher leaks from the door
Error code related to water level

Compatibility

Fits the Frigidaire family. Specifically:

Any unit originally equipped with OEM part number(s): AP4982393, 154209801.
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: AP4982393, 154209801

Tools you'll need

Screwdriver
Pliers
Towels
Work gloves

Difficulty: Moderate · Time: 30-60 minutes

How to install the 154773201, step by step

Disconnect power and water supply to the dishwasher.
Remove the lower dish rack and lower spray arm.
Locate the float switch assembly at the bottom of the tub.
Disconnect any electrical wires attached to the switch.
Release retaining clips or screws holding the switch in place.
Carefully remove the old float switch assembly.
Install the new float switch, ensuring it is securely seated.
Reconnect wires, reassemble, and restore power and water, then test.