Yes you can use your air fryer as a dehydrator to dehydrate food.
Most air fryers have a dehydrate setting on them and when you use the air fryer to dehydrate food you set the air fryer to the dehydrate setting.
Then the air fryer will work just fine as a dehydrator which is great as the air fryer is both a food fryer and a dehydrator.
I use my air fryer to dehydrate food a lot and it works great.
Just be sure to set the air fryer to the dehydrate setting or the food will just cook on the other setting.
An air fryer can also be used to reheat food.
Using an air fryer to reheat any leftover food that you have cooked in the air fryer can help keep your food crisp when reheated.
Just don't leave the food in the air fryer too long or it will overcook and burn.
But to reheat your food in your air fryer turn the air fryer to at least 350 F to 400 F degrees and then place your food into the air fryer.
Reheating food in the air fryer takes around 3 to 4 minutes at most and any longer than 4 minutes you risk overcooking the food and burning the food.
So just keep an eye on the air fryer when reheating the food as it takes less time to reheat the food in the air fryer than it does to cook the food in the air fryer.