What is the minimum wash solution temperature for spray-type ware washers that use chemicals to sanitize?

• A. 110 degrees F
• B. 120 degrees F
• C. 130 degrees F
• D. 140 degrees F

Answer: (B)

The key idea is that chemical sanitizers in spray-type ware washers need a warm wash to be effective. The wash temperature should be high enough to help loosen soils and allow the sanitizer to properly contact and act on surfaces, but not so hot that the sanitizer breaks down or loses potency. The minimum temperature that supports this balance is 120°F. At temperatures around 110°F, the sanitizer won’t work reliably, and cleaning and sanitizing performance would drop. Temperatures well above 120°F—like 130 or 140°F—aren’t necessary for chemical sanitizers and can risk reducing sanitizer effectiveness and creating safety concerns. So, 120°F is the appropriate minimum to ensure proper sanitizing action in spray-type ware washers using chemicals.