What water temperature does my GSD500 dishwasher need to work properly?
The entering water must be at least 120°F for good washing and drying results. To prevent dish damage, inlet water should not exceed 150°F. You can test your water temperature using a candy or meat thermometer by turning on the hot water faucet nearest the dishwasher and measuring the temperature in a glass.
From the official GE GSD500 Dishwasher manual, page 6
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