Preheat the air fryer to 325 F / 160C.
Remove pizza slices from the refrigerator and place them in the Air Fryer Basket. Make sure the pizza slices do not overlap.
Cook the pizza for 3-4 minutes and quickly open the air fryer basket to check the pizza.
If it is warmed through to your liking, then take the pizza slices out.
If you feel it needs a little more time, then cook for another 1-2 minutes at a time, then check until done.