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How to Test a Dishwasher Water Inlet Valve

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The water inlet valve works as a control gate between home water supply hose and the dishwasher. When a cycle is selected and the dishwasher is turned ON, the inlet valve is opened for water flow into the dishwasher. The valve is closed at the end of the fill cycle. If you think that the water inlet valve is causing any problem in your dishwasher, you can follow the steps below to test the timer.

  1. 1Locate water inlet valve: Turn off the electricity at the circuit breaker panel or unplug the power cord. Turn off water supply to the dish washer. Remove the lower panel by unscrewing the mounting screws. You should see the water inlet valve at the end of the water hose that comes from under the sink.
  2. 2 Remove hoses from water inlet valve: Remove the water intake hose from the water inlet valve by using a wrench or pliers.
  3. 3Remove second water hose from water inlet valve: There is a water hose that directs water from the valve to the dishwasher. Remove this hose from the water inlet valve by using a wrench or pliers.
  4. 4 Remove water inlet valve: Label all the wires indicating which terminals they connect. You can use masking tape for labeling. Disconnect the wires from the water inlet valve. Unscrew the mounting screws and pull off the water intake valve.
  5. 5 Check filter screen: Remove the filter screen from the water intake valve and inspect to see if it has dirt or debris. Clean the filter screen by using old tooth brush and dishwashing soap. Rinse the filter using hot running water. Install the filter screen in the water inlet valve.
  6. 6 Test water inlet valve for continuity:
    Set your VOM (volt-ohm-meter) for testing continuity (RX1). Touch the terminals of the inlet valve with the probes of the VOM. If the VOM reads infinity, the water inlet valve is bad and it needs to be replaced. . Refer to how to replace dishwasher water inlet valve if you need instructions on how to install the new inlet valve.
  7. 7Check for other imperfection: Check the water inlet valve for hair line cracks. If there are cracks, they will lead to water leak. Also, excessive debris that can not be cleaned will restrict proper functionality of the water inlet valve. In this case, you need to replace the water inlet valve.