what temp to dehydrate sweet potatoes
1 Arrange the potatoes on your food dehydrator trays, making sure the potatoes don't overlap. 2  Turn on your food dehydrator and set the temperature between 125Â°F and 135Â°F (or per your food dehydrator's instructions). 3  Potatoes will be leathery and/or brittle when fully dried. 4  Drying time for potatoes: between 6-14 hours.