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How to Replace a Dishwasher Float Switch

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The float switch is a safety device. It prevents overfilling the dishwasher with water and flooding the kitchen. If every component is working correctly in the dishwasher, the timer stops the water flow to the dishwasher. If the timer is defective and fails to stop the water fill, the float switch works as a safety device, and breaks a circuit causing the water supply to cutoff. If you think that the float switch is causing any problem in your dishwasher, you can follow the steps below to replace the float switch.

  1. 1 Locate float and float switch: Open the dishwasher door. The float is a dome-shaped plastic component normally located at one of the two front corners. The float switch is directly beneath the switch.
  2. 2 Disconnect the float switch: Turn off the electricity at the circuit breaker panel. Remove the lower dish rack.

    Remove the kick panel to get access to the float switch. Pull off the wires from the float switch terminals. Remember to label the wires by pulling them one by one. This will help you during replacement process of the float switch. Remove the float switch from its mounting bracket by unscrewing the screws. Note down the model and brand name of your dishwasher.

  3. 3 Buy a new float switch: Go to an appliance parts store with the old float switch and model and brand name of your dishwasher. Buy a new float switch by matching the old float switch. The model and brand name will help the store sales person to find the correct part for you. You can also buy the float switch from an online appliance parts store.
  4. 4Install new float switch: Use the instructions that came with the new float switch to replace the float switch. If you do not have the instructions, you can just follow the steps above in reverse order to install the float switch.