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No, a dishwasher does not typically use hot water from a boiler or water heater. Instead, it has its own internal heating element that heats the water as needed during the wash cycle.

Most dishwashers are designed to connect to the cold water supply line. The dishwasher then heats the water internally to the desired temperature for effective cleaning. This internal heating element raises the temperature of the cold water to the necessary levels, typically between 120°F (49°C) and 140°F (60°C), depending on the dishwasher model and selected cycle.

Using its internal heating element allows the dishwasher to control and maintain the water temperature throughout the wash cycle. It ensures that the water reaches the appropriate temperature for optimal cleaning and sanitization of the dishes, glasses, and utensils.

It's worth noting that some high-end dishwashers may offer a "sanitize" or "boost" option that requires hot water input. In these cases, the dishwasher may accept a hot water supply and use it in conjunction with its internal heating element to achieve even higher temperatures for sanitizing purposes. However, for regular wash cycles, a dishwasher primarily relies on its own heating element to heat the water.

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