What water temperature does the GSD820 require for good washing and drying?
The entering water must be between 120°F and 140°F for good washing and drying. To prevent dish damage, inlet water should not exceed 150°F. If your water temperature is less than 140°F, you should use the WASH HEAT BOOST option. (Page 6)
From the official GE GSD820 Dishwasher manual, page 6
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