The hottest setting on a dishwasher can vary depending on the specific model and manufacturer. However, in most standard dishwashers, the hottest setting is typically labeled as "Sanitize" or "Heavy Duty." This setting uses high water temperature and extended wash cycles to ensure thorough cleaning and sanitization of the dishes. The exact temperature reached can range between 150°F (65°C) to 170°F (75°C) or even higher in some models. It's important to consult the dishwasher's manual or contact the manufacturer for precise information regarding the hottest setting on a specific dishwasher model.