Testing a residential dishwasher door latch and its integrated microswitch to determine if it is functioning properly involves performing a continuity test with a digital multimeter. First, disconnect power to the dishwasher at the main circuit breaker for absolute safety and open the door to remove the inner console cover and access the switch terminals. Second, pull the wire connectors off the microswitch. Third, set your digital multimeter to the ohms resistance scale and touch the meter probes to the switch terminals while manually depressing and releasing the plastic latch lever. You can troubleshoot electrical switches safely. You can verify that your test is successful when the multimeter toggles between zero ohms (continuity) when closed and infinite resistance (OL) when open.
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