What does it mean when the sanitized light on my dishwasher blinks?
A blinking Sanitized Light signifies that sanitization was not completed successfully; this can be due to interruptions during final rinse or insufficient water heater temperatures set below recommended 120°F (49°C). (Page 23)
From the official KitchenAid Kdtm404kps Dishwasher manual, page 23
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