The choice to have transparent doors on washing machines and not on dishwashers can be attributed to a few factors:
Design and aesthetics: Transparent doors on washing machines allow users to visually monitor the progress of the laundry cycle, adding a modern and sleek aesthetic to the appliance. The ability to see the clothes inside can also create a sense of interaction and engagement with the washing process. On the other hand, dishwashers are typically designed to be concealed within cabinets or under countertops, prioritizing a seamless integration with the kitchen decor. Therefore, transparent doors may not be as desirable or necessary for dishwashers from a design standpoint.
Different washing processes: Washing machines and dishwashers have distinct purposes and operate differently. Washing machines involve different cycles and settings that vary based on the type of fabric being washed. Being able to observe the movement and condition of the clothes during the cycle can be beneficial for determining if the wash is progressing correctly and avoiding potential issues like tangling or damage. Dishwashers, on the other hand, primarily clean dishes and utensils using high-temperature water and detergent, without the need for monitoring during the cycle.
Privacy and hiding dirty dishes: Dishwashers tend to accumulate dirty dishes, and some users may prefer to keep them hidden from view. A transparent door on a dishwasher would expose the dirty dishes and potentially create an undesirable visual element in the kitchen. In contrast, washing machines typically handle clean laundry, so there's less concern about privacy or the appearance of the items being washed.
While there may be variations in design choices among different appliance manufacturers, these factors help explain why transparent doors are more commonly found in washing machines and not in dishwashers.