How to Test a Dishwasher Water Inlet Valve

If you are experiencing problems with your dishwasher, it is helpful to know how to test a water inlet valve. These valves are controlled by one or two solenoids. Over time, either the solenoids or the seals themselves can fail.

Step 1: Lock Out Dishwasher

Before working on the dishwasher, disconnect it from its power and water supply. You can unplug it or shut off the circuit breaker to stop the flow of electricity. Water supply can usually be shut off at the angle stop under the kitchen sink.

Step 2: Expose Valve

Unscrew the kick panel in the bottom left or right corner by removing 2 to 4 screws. The valve will be connect to 2 to 4 wires as well as supply and drain hoses. Remove the wires with pliers; do not pull on them.

Step 3: Test Solenoids

Hook up the ohmmeter to the terminals. A reading of infinity indicates that the solenoid has failed.

Step 4: Test Valve Seal

Even if the solenoid works, the seal may be broken or the dishwasher inlet valve could be clogged with food debris. Unfasten the supply and drain hoses if necessary to inspect.