What is the temperature of the dishwasher wash cycle?

• A. 120-130 degrees F
• B. 140-160 degrees F
• C. 170-180 degrees F
• D. 190-200 degrees F

Answer: (B)

The wash cycle uses hot water to break down grease and soils and to activate the detergent. The sweet spot for cleaning effectively without harming dishes is typically around 140–160°F. This temperature is hot enough to emulsify fats and loosen stubborn soils, yet not so hot that it risks damage to delicate glassware or rubber parts or wastes excessive energy.

Temps much lower, like 120–130°F, tend to be insufficient for robust cleaning and detergent performance. Temps much higher, such as 170–180°F or 190–200°F, are usually reserved for the sanitation or rinse portions of the cycle, where the goal is disinfection rather than primary cleaning. So, the wash cycle is best characterized by a temperature in the 140–160°F range.