In a bowl, add radish slices, oil, garlic powder, salt and black pepper and toss to coat well.
Grease the Air Fryer Basket with cooking spray and then slide inside.
Adjust the temperature of Air Fryer to 370°F to preheat for 5 minutes.
After preheating, arrange the radish slices into the greased Air Fryer Basket in a single layer.
Slide the basket into Air Fryer and set the time for 8 minutes.
After 8 minutes of cooking, shake the basket and spray the chips with cooking spray.
Adjust the temperature to 400 °F to preheat for 8-10 minutes.
After cooking time is finished, remove the radish chips from Air Fryer and serve.