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It is normal for some dishwashers to run for up to two hours or more under certain conditions and on certain models. 1  On select models, the timer display or dial will stop for long periods (up to 1/2 hour) during the wash and dry cycles while the heater is activated. On models featuring Auto Hot Start, the cycle may be extended up to 20 minutes while the dishwasher heats the water.
The dishwasher will sense if it needs a normal cycle or a shorter cycle so on smart wash it will range from 1 hours and 15 minutes to 2 hours. Ask Your Own Appliance Question. Customer: replied 6 years ago.I have not actually timed it but the cycle seems much longer and it does not seem to dry as well either.y Kenmore dishwasher takes an extraordinary amount of time to complete a cycle. The long wash cycle happens in both the smart wash and normal cycle mode.