How to Change the Pressure Switch in a Dishwasher

Jul 18, 2023, 18:59pm

The dishwasher is an electrical appliance that uses water to fulfill its role. For this, it is composed of different organs for filling and emptying. Thus, the start of a washing cycle is done thanks to an essential part called pressure switch which is connected to the compression chamber.

Indeed, for the washing cycle to work well, there is a level of water to respect in the tank of the dishwasher. It is precisely when this water level is reached that the pressure switch does its job by automatically cutting off the water supply from the drain pump which connects the machine and the water source. The pressure switch therefore prevents the overflow of water, by controlling its level present in the dishwasher.

The pressure switch of a dishwasher can hold its role for up to ten years by taking good care of the use of the device. Therefore, to maintain good performance, it is necessary to close the tap from which the machine’s water supply comes at the end of each cycle. You must connect your washing machine to a water source with adequate water pressure to wash all kitchen utensils.

It happens that this part breaks down especially when you notice:

  • the immediate stop of the water flow in the dishwasher during the wash cycle,
  • that the appliance is working, but there is no water in it,
  • The device contains a lot of water up to overflowing.

After checking, when it is clear that the fault comes from this part, it must be replaced. Since the operation is simple, you can do it by yourself.

By its round or oval shape, the location of the pressure switch can vary according to the brands and models of washing machine. The most common location is inside the unit on one side of the side panels.

The pressure switch in a dishwasher is an important component that monitors the water level inside the appliance. It ensures that the dishwasher fills and drains appropriately during the wash cycle. If you’re experiencing issues such as water overfilling or underfilling, or if your dishwasher fails to start or stop properly, the pressure switch may be the cause. In such cases, it may be necessary to replace the pressure switch. In this article, we will guide you through the process of changing the pressure switch in a dishwasher.

How to Change the Pressure Switch in a Dishwasher

1. Safety Precautions

Before starting the process of changing the pressure switch, ensure that the dishwasher is completely disconnected from its power source. This will prevent any electrical accidents and ensure your safety during the procedure.

2. Access the Pressure Switch

The pressure switch is typically located behind the control panel of the dishwasher. Consult your dishwasher’s manual or refer to the manufacturer’s instructions to locate the specific position of the pressure switch.

3. Disconnect the Power and Water Supply

Before proceeding with the replacement, turn off the power supply to the dishwasher. Additionally, shut off the water supply to prevent any water from entering the appliance during the process.

4. Remove the Control Panel

To access the pressure switch, you’ll need to remove the control panel. This process may vary depending on the model of your dishwasher. In general, follow these steps:

  1. Locate and remove any screws or fasteners securing the control panel to the dishwasher’s door.
  2. Carefully lift the control panel, ensuring not to damage any wires or components connected to it.
  3. Take note of the wiring connections and their positions for reassembly.

5. Disconnect the Old Pressure Switch

Once you have access to the pressure switch, follow these steps to disconnect it:

  1. Identify the pressure switch and locate the wires connected to it.
  2. Carefully disconnect the wires from the terminals of the pressure switch. Take note of the wire placement or take a photo for reference when connecting the new switch.

6. Install the New Pressure Switch

Follow these steps to install the new pressure switch:

  1. Take the new pressure switch and position it in the same location as the old one.
  2. Connect the wires to the corresponding terminals on the new pressure switch, ensuring they are properly aligned and securely attached.

7. Reassemble the Control Panel

Once the new pressure switch is installed, it’s time to reassemble the control panel:

  1. Place the control panel back into its original position on the dishwasher door.
  2. Secure the control panel by reattaching any screws or fasteners that were removed earlier.
  3. Ensure that all wires are properly guided through the control panel and connected to their respective components.

8. Restore Power and Water Supply

Before testing the dishwasher, reconnect the power supply and turn on the water supply.

How to Change the Pressure Switch in a Dishwasher

9. Test the New Pressure Switch

With the power and water supply restored, run a test cycle on the dishwasher to ensure the new pressure switch is functioning correctly. Monitor the water fill and drain stages to verify proper operation.

By following these steps, you can successfully change the pressure switch in your dishwasher. Remember to consult your dishwasher’s manual or refer to the manufacturer’s instructions for any specific guidelines or recommendations. If you are unsure about replacing the pressure switch yourself or encounter any difficulties during the process, it is recommended to seek the assistance of a professional appliance technician. They have the expertise and tools necessary to safely and effectively replace the pressure switch.